fix: format.enable default true

Author: xiyaowong

setting/schema.json

@@ -1199,7 +1199,7 @@
             "type": "object"
         },
         "format.enable": {
-            "default": "true",
+            "default": true,
             "markdownDescription": "Enable code formatter.",
             "scope": "resource",
             "type": "boolean"
@@ -1818,4 +1818,4 @@
     },
     "title": "setting",
     "type": "object"
-}
+}