fix(snippets/json): reorder ACF checkbox field snippet and set correct type

Author: Doğa Gürdal

snippets/json.json

@@ -170,13 +170,13 @@
       "{",
       "\t\"label\": \"$1\",",
       "\t\"name\": \"$2\",",
-      "\t\"type\": \"select\",",
+      "\t\"type\": \"checkbox\",",
+      "\t\"layout\": \"${3|horizontal,vertical|}\",",
+      "\t\"toggle\": ${4|false,true|},",
       "\t\"choices\": {",
-      "\t\t\"$3\": \"$4\"",
+      "\t\t\"$5\": \"$6\"",
       "\t},",
-      "\t\"default_value\": \"$5\",",
-      "\t\"layout\": \"${6|horizontal,vertical|}\",",
-      "\t\"toggle\": ${7|true,false|}",
+      "\t\"default_value\": \"${7:$5}\"",
       "}"
     ]
   },