Revert "fixed type hint of hrandfield method"

This reverts commit 1fc6f9b.

Signed-off-by: Mikhail Koviazin <[email protected]>

Author: Mikhail Koviazin

valkey/commands/core.py

@@ -2153,7 +2153,7 @@ def pttl(self, name: KeyT) -> ResponseT:
 
     def hrandfield(
         self, key: str, count: int = None, withvalues: bool = False
-    ) -> Union[bytes, List[bytes], None]:
+    ) -> ResponseT:
         """
         Return a random field from the hash value stored at key.