fix call

Author: blink1073

test/asynchronous/test_cursor.py

@@ -372,7 +372,7 @@ async def test_explain_csot(self):
         # Workaround for SERVER-108463
         names = client["explain-test"].list_collection_names()
         if "collection" not in names:
-            collection = client["explain-test"].create_collection("collection")
+            collection = await client["explain-test"].create_collection("collection")
         else:
             collection = client["explain-test"]["collection"]