build(deps): Bump gatsby-plugin-layout from 4.14.0 to 4.15.0

Bumps [gatsby-plugin-layout](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-layout) from 4.14.0 to 4.15.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-layout/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-layout@4.15.0/packages/gatsby-plugin-layout)

---
updated-dependencies:
- dependency-name: gatsby-plugin-layout
  dependency-version: 4.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -24,7 +24,7 @@
     "decode-uri-component": "^0.4.1",
     "gatsby": "^5.15.0",
     "gatsby-plugin-feed": "^5.15.0",
-    "gatsby-plugin-layout": "^4.14.0",
+    "gatsby-plugin-layout": "^4.15.0",
     "gatsby-plugin-matomo": "^0.17.0",
     "gatsby-plugin-sass": "^6.15.0",
     "gatsby-plugin-sitemap": "^6.15.0",