Fix typo

Author: alallema

meilisearch/client.py

@@ -207,7 +207,7 @@ def index(self, uid: str) -> Index:
             return Index(self.config, uid=uid)
         raise ValueError("The index UID should not be None")
 
-    def multi_search(self, queries: List[Dict[str, Any]]) -> Dict[str, List[Dict[str, Any]]:
+    def multi_search(self, queries: List[Dict[str, Any]]) -> Dict[str, List[Dict[str, Any]]]:
         """Multi Search in the index.
 
         Parameters