Configuring git user is workflow to permit rebase

.github/workflows/pull-request.yaml

@@ -19,6 +19,11 @@ jobs:
         
       - name: Fetch main-source
         run: git fetch origin main-source
+
+      - name: Set git user for rebase
+        run: |
+          git config user.name "$(git log -n 1 --pretty=format:%an)"
+          git config user.email "$(git log -n 1 --pretty=format:%ae)"
         
       - name: Rebase to main-source
         run: git rebase origin/main-source