chore(deps): bump gatsby from 4.25.6 to 4.25.8

Bumps [gatsby](https://github.com/gatsbyjs/gatsby) from 4.25.6 to 4.25.8.
- [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]@4.25.8)

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

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

package.json

@@ -24,7 +24,7 @@
     "ansi-to-react": "^6.1.6",
     "bootstrap": "^4.6.2",
     "create-react-class": "^15.7.0",
-    "gatsby": "^4.25.6",
+    "gatsby": "^4.25.8",
     "gatsby-plugin-fontawesome-css": "^1.2.0",
     "gatsby-plugin-image": "^2.24.0",
     "gatsby-plugin-json-remark": "^1.1.5",