Bump @next/mdx from 12.1.5 to 12.1.6 (#444)

Bumps [@next/mdx](https://github.com/vercel/next.js/tree/HEAD/packages/next-mdx) from 12.1.5 to 12.1.6.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/commits/v12.1.6/packages/next-mdx)

---
updated-dependencies:
- dependency-name: "@next/mdx"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

package.json

@@ -17,7 +17,7 @@
     "@hackclub/meta": "1.1.32",
     "@hackclub/theme": "^0.3.3",
     "@mdx-js/loader": "^1.6.22",
-    "@next/mdx": "^12.1.5",
+    "@next/mdx": "^12.1.6",
     "@octokit/auth-app": "^3.6.1",
     "@octokit/core": "^3.6.0",
     "@octokit/rest": "^18.12.0",

yarn.lock

@@ -591,10 +591,10 @@
   dependencies:
     glob "7.1.7"
 
-"@next/mdx@^12.1.5":
-  version "12.1.5"
-  resolved "https://registry.yarnpkg.com/@next/mdx/-/mdx-12.1.5.tgz#302fbf195b406d32423f6a0317771d3b27f88e8e"
-  integrity sha512-3R8J/3jKz4bCAOWDKVhxXoUETy3eqC+zaNlgwLK7LAid3UZjioVZ+jxIJmopd1auqjpev7doKeRE2p8YG55QLg==
+"@next/mdx@^12.1.6":
+  version "12.1.6"
+  resolved "https://registry.yarnpkg.com/@next/mdx/-/mdx-12.1.6.tgz#14677d83ab2c01667d44666712555ed2315c5ae3"
+  integrity sha512-pyE8CZQ3xHs5rIXp6Js4zN3+u77Y50YFw5kHMtbW1Gfw6zwl9UcJci4K27vURDAItoVFdcwZZ4kvuI2YjO1Cwg==
 
 "@next/swc-android-arm-eabi@12.1.5":
   version "12.1.5"