Bump next from 14.2.10 to 14.2.21

Bumps [next](https://github.com/vercel/next.js) from 14.2.10 to 14.2.21.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.10...v14.2.21)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
...

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

package.json

@@ -27,7 +27,7 @@
     "classnames": "^2.3.1",
     "cypress": "^10.1.0",
     "gray-matter": "^4.0.2",
-    "next": "^14.2.10",
+    "next": "^14.2.21",
     "next-mdx-remote": "^4.1.0",
     "next-remote-watch": "1.0.0",
     "prismjs": "^1.27.0",