Bump @mdx-js/loader from 1.6.22 to 3.1.1

Bumps [@mdx-js/loader](https://github.com/mdx-js/mdx/tree/HEAD/packages/loader) from 1.6.22 to 3.1.1.
- [Release notes](https://github.com/mdx-js/mdx/releases)
- [Changelog](https://github.com/mdx-js/mdx/blob/main/changelog.md)
- [Commits](https://github.com/mdx-js/mdx/commits/3.1.1/packages/loader)

---
updated-dependencies:
- dependency-name: "@mdx-js/loader"
  dependency-version: 3.1.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -21,7 +21,7 @@
     "@hackclub/markdown": "^0.0.43",
     "@hackclub/meta": "1.1.32",
     "@hackclub/theme": "^0.3.3",
-    "@mdx-js/loader": "^1.6.22",
+    "@mdx-js/loader": "^3.1.1",
     "@next/mdx": "^16.1.6",
     "@octokit/auth-app": "^8.1.2",
     "@octokit/core": "^5.2.0",