Fix contributor-login

Author: kenodegard

.github/workflows/tests.yml

@@ -61,7 +61,8 @@ jobs:
           label: cla-test
           repository: conda-sandbox/cla
           contributor-id: ${{ github.event.pull_request.number }}
-          contributor-login: random
+          # NOTE: using an actual username here will will trigger GH notifications to that user
+          contributor-login: '`login`'
           commit-status-label: CLA test
           token: ${{ secrets.SANDBOX_CLA_TOKEN }}
           pr-token: ${{ secrets.SANDBOX_CLA_PR_TOKEN }}