chore(deps): update dependency next-sitemap to v4

Author: renovate[bot]

package.json

@@ -33,7 +33,7 @@
     "eslint-config-next": "12.0.7",
     "feed": "^4.2.2",
     "jest": "^27.4.7",
-    "next-sitemap": "^1.9.12",
+    "next-sitemap": "^4.2.3",
     "react-test-renderer": "^17.0.2",
     "typescript": "4.5.5"
   }