Update IMAGE_INLINE_SIZE_LIMIT docs (facebook#10631)

The variable is also used in dev.

docusaurus/docs/advanced-configuration.md

@@ -24,7 +24,7 @@ You can adjust various development and production settings by setting environmen
 | CHOKIDAR_USEPOLLING       |   ✅ Used   | 🚫 Ignored | When set to `true`, the watcher runs in polling mode, as necessary inside a VM. Use this option if `npm start` isn't detecting changes.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
 | GENERATE_SOURCEMAP        | 🚫 Ignored  |  ✅ Used   | When set to `false`, source maps are not generated for a production build. This solves out of memory (OOM) issues on some smaller machines.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
 | INLINE_RUNTIME_CHUNK      | 🚫 Ignored  |  ✅ Used   | By default, Create React App will embed the runtime script into `index.html` during the production build. When set to `false`, the script will not be embedded and will be imported as usual. This is normally required when dealing with CSP.                                                                                                                                                                                                                                                                                                                                                                                                                           |
-| IMAGE_INLINE_SIZE_LIMIT   | 🚫 Ignored  |  ✅ Used   | By default, images smaller than 10,000 bytes are encoded as a data URI in base64 and inlined in the CSS or JS build artifact. Set this to control the size limit in bytes. Setting it to 0 will disable the inlining of images.                                                                                                                                                                                                                                                                                                                                                                                                                                          |
+| IMAGE_INLINE_SIZE_LIMIT   |   ✅ Used   |  ✅ Used   | By default, images smaller than 10,000 bytes are encoded as a data URI in base64 and inlined in the CSS or JS build artifact. Set this to control the size limit in bytes. Setting it to `0` will disable the inlining of images.                                                                                                                                                                                                                                                                                                                                                                                                                                          |
 | FAST_REFRESH              |   ✅ Used   | 🚫 Ignored | When set to `false`, disables experimental support for Fast Refresh to allow you to tweak your components in real time without reloading the page.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
 | TSC_COMPILE_ON_ERROR      |   ✅ Used   |  ✅ Used   | When set to `true`, you can run and properly build TypeScript projects even if there are TypeScript type check errors. These errors are printed as warnings in the terminal and/or browser console.                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
 | ESLINT_NO_DEV_ERRORS      |   ✅ Used   | 🚫 Ignored | When set to `true`, ESLint errors are converted to warnings during development. As a result, ESLint output will no longer appear in the error overlay.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |