build(deps): bump gatsby-plugin-feed from 5.10.0 to 5.12.0

Bumps [gatsby-plugin-feed](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-feed) from 5.10.0 to 5.12.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-feed/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-feed@5.12.0/packages/gatsby-plugin-feed)

---
updated-dependencies:
- dependency-name: gatsby-plugin-feed
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -21,7 +21,7 @@
  "date-fns": "^2.30.0",
  "flexsearch": "^0.7.31",
  "gatsby": "^5.11.0",
- "gatsby-plugin-feed": "^5.10.0",
+ "gatsby-plugin-feed": "^5.12.0",
  "gatsby-plugin-google-gtag": "^5.11.0",
  "gatsby-plugin-google-tagmanager": "^5.11.0",
  "gatsby-plugin-image": "^3.11.0",