chore(deps): Bump next from 14.1.0 to 14.2.21

Bumps [next](https://github.com/vercel/next.js) from 14.1.0 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@v14.1.0...v14.2.21)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/stc/package.json

@@ -12,7 +12,7 @@
     "chart.js": "4.1.2",
     "chartjs-adapter-date-fns": "3.0.0",
     "date-fns": "2.29.3",
-    "next": "14.1.0",
+    "next": "14.2.21",
     "nextra": "2.0.1",
     "nextra-theme-docs": "2.0.1",
     "react": "^18.2.0",