GH-108 Update dependency next to v14.2.21 [SECURITY] (#108)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -24,7 +24,7 @@
     "sharp": "^0.33.2"
   },
   "devDependencies": {
-    "next": "14.2.15",
+    "next": "14.2.21",
     "@next/bundle-analyzer": "^14.1.0",
     "@total-typescript/ts-reset": "^0.6.0",
     "@types/node": "^20.11.20",