Model Maker Audio: Make output for exporting labels cleaner

The tailing . slightly leads to confusion as developers are not sure iit's part of the file name. We don't have this problem for export_tflite

PiperOrigin-RevId: 373807614

Author: wangtz

tensorflow_examples/lite/model_maker/core/task/classification_model.py

@@ -98,7 +98,7 @@ def _export_labels(self, label_filepath):
     if label_filepath is None:
       raise ValueError("Label filepath couldn't be None when exporting labels.")
 
-    tf.compat.v1.logging.info('Saving labels in %s.', label_filepath)
+    tf.compat.v1.logging.info('Saving labels in %s', label_filepath)
     with tf.io.gfile.GFile(label_filepath, 'w') as f:
       f.write('\n'.join(self.index_to_label))