Satisfy github format check

backend/open_webui/retrieval/vector/dbs/milvus.py

@@ -66,7 +66,7 @@ class MilvusClient:
                 _ids.append(item.get("id"))
                 # normalize milvus score from [-1, 1] to [0, 1] range
                 # https://milvus.io/docs/de/metric.md
-                _dist = (item.get("distance") + 1.0)/2.0
+                _dist = (item.get("distance") + 1.0) / 2.0
                 _distances.append(_dist)
                 _documents.append(item.get("entity", {}).get("data", {}).get("text"))
                 _metadatas.append(item.get("entity", {}).get("metadata"))