Update approve-merge.yml (#421)

Author: willum070

.github/workflows/approve-merge.yml

@@ -36,6 +36,12 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.ref }} # Checkout the PR's head commit
           token: ${{ secrets.GH_MERGE_TOKEN }}
+          
+      - name: Approve PR
+        run: gh pr review --approve "$PR_URL"
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GH_TOKEN: ${{ secrets.GH_APPROVER_TOKEN }}
 
       - name: Merge PR
         run: gh pr merge --auto --squash --delete-branch "$PR_URL"