chore(deps): bump gatsby from 2.23.1 to 4.25.7

Bumps [gatsby](https://github.com/gatsbyjs/gatsby) from 2.23.1 to 4.25.7.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/compare/gatsby@2.23.1...gatsby@4.25.7)

---
updated-dependencies:
- dependency-name: gatsby
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -5,7 +5,7 @@
   "author": "Austin Green",
   "dependencies": {
     "bulma": "^0.9.0",
-    "gatsby": "^2.20.35",
+    "gatsby": "^4.25.7",
     "gatsby-image": "^2.3.5",
     "gatsby-plugin-netlify": "^2.2.4",
     "gatsby-plugin-netlify-cms": "^4.2.5",