Fix typo

Author: sgugger

src/transformers/data/metrics/__init__.py

@@ -28,7 +28,7 @@
 DEPRECATION_WARNING = (
     "This metric will be removed from the library soon, metrics should be handled with the 🤗 Datasets "
     "library. You can have a look at this example script for pointers: "
-    "https://github.com/huggingface/transformers/blob/master/examples/text-classification/run_glue.py",
+    "https://github.com/huggingface/transformers/blob/master/examples/text-classification/run_glue.py"
 )