Bump gatsby from 5.2.0 to 5.9.1

Bumps [gatsby](https://github.com/gatsbyjs/gatsby) from 5.2.0 to 5.9.1.
- [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@5.2.0...gatsby@5.9.1)

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

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

package.json

@@ -21,7 +21,7 @@
     "@fontsource/roboto-flex": "^4.5.2",
     "@icons-pack/react-simple-icons": "^6.1.0",
     "@mdx-js/react": "^2.1.5",
-    "gatsby": "^5.0.0",
+    "gatsby": "^5.9.1",
     "gatsby-plugin-image": "^3.2.0",
     "gatsby-plugin-mdx": "^5.2.0",
     "gatsby-plugin-sass": "^6.2.0",