Configure git user email and name in workflow

Set global git user configuration for actions.

Author: cjdcordeiro

.github/workflows/test.yml

@@ -14,6 +14,8 @@ jobs:
       - env:
           GH_TOKEN: ${{ github.token }}
         run: |
+          git config --global user.email "you@example.com"
+          git config --global user.name "Your Name"
           git checkout -b foo
           touch bar
           git add bar