ci: xtrace qubesbuilder up-to-date check

.github/workflows/main.yaml

@@ -45,8 +45,9 @@ jobs:
         with:
           fetch-depth: 0
       - uses: actions/setup-python@v5
+      - name: Test if .qubesbuilder is up-to-date
+        run: sh -x ./scripts/qubesbuilder-gen.sh test
       - uses: pre-commit/[email protected]
-
       - name: Lint commits
         # yamllint disable-line rule:line-length
         run: |