ci: switch to gh pat

.github/workflows/update-vendor-hash.yml

@@ -63,28 +63,16 @@ jobs:
           echo "vendorHash updated successfully!"
 
       - name: Commit and push vendorHash update
+        env:
+          GH_PAT: ${{ secrets.GH_PAT }}
         run: |
           set -euo pipefail
-
           if ! git diff --quiet flake.nix; then
-            git config user.name "github-actions[bot]"
-            git config user.email "github-actions[bot]@users.noreply.github.com"
-
+            git config user.name "dms-ci"
+            git config user.email "dms-ci@users.noreply.github.com"
             git add flake.nix
-            git commit -m "nix: update vendorHash for go.mod changes"
-
-            for attempt in 1 2 3; do
-              if git push; then
-                echo "Successfully pushed vendorHash update"
-                exit 0
-              fi
-              echo "Push attempt $attempt failed, pulling and retrying..."
-              git pull --rebase
-              sleep $((attempt*2))
-            done
-
-            echo "Failed to push after retries" >&2
-            exit 1
+            git commit -m "nix: update vendorHash for go.mod changes" || exit 0
+            git push https://x-access-token:${GH_PAT}@github.com/${{ github.repository }}.git HEAD:master
           else
             echo "No changes to flake.nix"
           fi