fix(deps): update dependency next to v14.2.21 [security] (#83)

Author: renovate[bot]

package.json

@@ -21,7 +21,7 @@
     "@t3-oss/env-nextjs": "0.11.1",
     "framer-motion": "11.11.8",
     "geist": "1.3.1",
-    "next": "14.2.15",
+    "next": "14.2.21",
     "next-sanity": "9.5.0",
     "react": "18.3.1",
     "react-dom": "18.3.1",