chore(deps): bump gatsby from 5.3.3 to 5.9.1 (#217)

Bumps [gatsby](https://github.com/gatsbyjs/gatsby) from 5.3.3 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/[email protected]@5.9.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tobias Nett <[email protected]>

Author: dependabot[bot]

package.json

@@ -13,7 +13,7 @@
     "@reach/router": "^1.3.4",
     "bootstrap": "^4.3.1",
     "canvas": "^2.8.0",
-    "gatsby": "^5.0.0",
+    "gatsby": "^5.9.1",
     "gatsby-plugin-catch-links": "^5.3.0",
     "gatsby-plugin-image": "^3.3.2",
     "gatsby-plugin-manifest": "^5.3.1",