chore: update static cms to v4.0.0

Author: KaneFreeman

package.json

@@ -12,7 +12,7 @@
     "lint": "next lint"
   },
   "dependencies": {
-    "@staticcms/core": "^3.4.5",
+    "@staticcms/core": "^4.0.0",
     "autoprefixer": "^10.4.14",
     "date-fns": "^2.30.0",
     "gray-matter": "^4.0.3",