build(deps): bump gatsby from 5.12.7 to 5.12.8

Bumps [gatsby](https://github.com/gatsbyjs/gatsby) from 5.12.7 to 5.12.8.
- [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/[email protected]@5.12.8)

---
updated-dependencies:
- dependency-name: gatsby
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -20,7 +20,7 @@
     "bootstrap": "^5.3.2",
     "date-fns": "^2.30.0",
     "flexsearch": "^0.7.31",
-    "gatsby": "^5.12.7",
+    "gatsby": "^5.12.8",
     "gatsby-adapter-netlify": "^1.0.1",
     "gatsby-plugin-feed": "^5.12.1",
     "gatsby-plugin-google-gtag": "^5.12.1",