fix(opensearch): update logger warning (#2999)

mem0/vector_stores/opensearch.py

@@ -83,8 +83,8 @@ class OpenSearchDB(VectorStoreBase):
             },
         }
 
-        logger.warning(f"Creating index {name}, it might take 1-2 minutes...")
         if not self.client.indices.exists(index=name):
+            logger.warning(f"Creating index {name}, it might take 1-2 minutes...")
             self.client.indices.create(index=name, body=index_settings)
 
             # Wait for index to be ready