Fix duplicate bulk write test name (#1671)

Author: isabelatkinson

source/crud/tests/unified/client-bulkWrite-partialResults.json

@@ -233,7 +233,7 @@ tests:
                 insertedId: 2
             updateResults: {}
             deleteResults: {}
-  - description: "partialResult is set when first operation fails during an unordered bulk write (summary)"
+  - description: "partialResult is set when second operation fails during an unordered bulk write (summary)"
     operations:
       - object: *client0
         name: clientBulkWrite