[hotfix] Update pattern matching in test_ml_lib_completeness to work with release branch
diff --git a/flink-ml-python/pyflink/ml/tests/test_ml_lib_completeness.py b/flink-ml-python/pyflink/ml/tests/test_ml_lib_completeness.py
index 2806e7b..db59df0 100644
--- a/flink-ml-python/pyflink/ml/tests/test_ml_lib_completeness.py
+++ b/flink-ml-python/pyflink/ml/tests/test_ml_lib_completeness.py
@@ -50,7 +50,7 @@
             this_directory, "../../../../flink-ml-lib"))
 
         paths = glob.glob(os.path.join(
-            FLINK_ML_LIB_SOURCE_PATH, "target", "flink-ml-lib-*.jar"))[0]
+            FLINK_ML_LIB_SOURCE_PATH, "target", "flink-ml-lib-*.jar"))
         paths = [path for path in paths if "test" not in path]
         if len(paths) != 1:
             raise Exception("The number of matched paths " + str(paths) + " is unexpected.")