build(deps): bump gatsby-transformer-remark from 6.12.3 to 6.13.1

Bumps [gatsby-transformer-remark](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-transformer-remark) from 6.12.3 to 6.13.1.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-transformer-remark/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-transformer-remark@6.13.1/packages/gatsby-transformer-remark)

---
updated-dependencies:
- dependency-name: gatsby-transformer-remark
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -28,7 +28,7 @@
     "gatsby-plugin-sitemap": "6.13.1",
     "gatsby-source-filesystem": "5.12.1",
     "gatsby-transformer-json": "5.13.1",
-    "gatsby-transformer-remark": "6.12.3",
+    "gatsby-transformer-remark": "6.13.1",
     "markdown-it": "14.0.0",
     "react": "18.2.0",
     "react-dom": "18.2.0",