build(deps): bump gatsby-plugin-manifest from 5.13.0 to 5.13.1 (#53)

Bumps [gatsby-plugin-manifest](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-manifest) from 5.13.0 to 5.13.1.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-manifest/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-manifest@5.13.1/packages/gatsby-plugin-manifest)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -18,7 +18,7 @@
   "dependencies": {
     "gatsby": "^5.13.1",
     "gatsby-plugin-image": "^3.13.1",
-    "gatsby-plugin-manifest": "^5.13.0",
+    "gatsby-plugin-manifest": "^5.13.1",
     "gatsby-plugin-sharp": "^5.13.1",
     "gatsby-plugin-theme-ui": "^0.16.1",
     "gatsby-source-filesystem": "^5.13.1",