docs: correct style-loader example (#3518)

website/docs/en/config/tools/style-loader.mdx

@@ -9,27 +9,27 @@ It is worth noting that Rsbuild does not enable `style-loader` by default. You c
 
 ## Object Type
 
-When this value is an Object, it is merged with the default config via Object.assign. For example:
+When `tools.styleLoader` is an object, it will be merged with the default configuration using `Object.assign`.
 
 ```js
 export default {
   tools: {
     styleLoader: {
-      insert: 'head'
+      insert: 'head',
     },
   },
 };
 ```
 
 ## Function Type
 
-When the value is a Function, the default config is passed in as the first parameter. You can modify the config object directly, or return an object as the final config. For example:
+When `tools.styleLoader` is a function, the default options will be passed in as the first parameter. You can directly modify this object or return a new object as the final options to be used. For example:
 
 ```js
 export default {
   tools: {
     styleLoader: (config) => {
-      config.loaderOptions.insert = 'head';
+      config.insert = 'head';
       return config;
     },
   },

website/docs/zh/config/tools/style-loader.mdx

@@ -9,7 +9,7 @@
 
 ## Object 类型
 
-当此值为 Object 类型时，与默认配置通过 Object.assign 合并。比如：
+当 `tools.styleLoader` 是一个 object 时，它会与默认配置通过 `Object.assign` 合并。
 
 ```js
 export default {
@@ -23,7 +23,7 @@ export default {
 
 ## Function 类型
 
-当此值为 Function 类型时，默认配置作为第一个参数传入，你可以直接修改配置对象，也可以返回一个对象作为最终配置。比如：
+当 `tools.styleLoader` 是一个 function 时，默认选项会作为第一个参数传入，你可以直接修改这个对象，也可以返回一个新的对象作为最终使用的选项。比如：
 
 ```js
 export default {