correct cluster return type

Signed-off-by: TJ Zhang <tj.zhang@improving.com>

Author: tjzhang-BQ

python/python/glide/async_commands/cluster_commands.py

@@ -1275,7 +1275,7 @@ async def scan(
 
     async def script_exists(
         self, sha1s: List[TEncodable], route: Optional[Route] = None
-    ) -> TClusterResponse[bool]:
+    ) -> TClusterResponse[List[bool]]:
         """
         Check existence of scripts in the script cache by their SHA1 digest.