Apply suggestion from @chalmerlowe

Author: chalmerlowe

.github/workflows/unittest.yml

@@ -22,7 +22,7 @@ jobs:
         python -m pip install nox
     - name: Run unit tests
 
-      # TODO 3.14 is not yet supported by pyarrow. See
+      # TODO (https://b.corp.google.com/issues/450370502) 3.14 is not yet supported by pyarrow. See
       # https://github.com/googleapis/google-cloud-python/issues/14686
       # https://github.com/apache/arrow/issues/47438
       # Reinstate running tests with 3.14 once this bug is fixed