fix: run makepkg as non-root user in docker container

.github/workflows/release-smoke.yml

@@ -66,7 +66,11 @@ jobs:
       - name: Generate .SRCINFO
         run: |
           docker run --rm -v "$(pwd)/aur-pkg:/build" archlinux:latest \
-            bash -c "cd /build && makepkg --printsrcinfo > .SRCINFO"
+            bash -c "
+              useradd -m builder
+              chown -R builder:builder /build
+              cd /build && su builder -c 'makepkg --printsrcinfo > .SRCINFO'
+            "
       - name: Push to AUR
         uses: KSXGitHub/github-actions-deploy-aur@v2.5.0
         with: