feat: Description update for remote-file

Author: kevinwang5658

src/schemastore/codify-schema.json

@@ -1089,7 +1089,7 @@
           },
           "hash": {
             "type": "string",
-            "description": "The md5 hash of the file."
+            "description": "Leave empty. The md5 hash of the file."
           },
           "onlyCreate": {
             "type": "boolean",