ci: promote_package job now correctly checkouts the code

.github/workflows/ci-conan.yml

@@ -291,6 +291,7 @@ jobs:
     name: Promote Conan package
     runs-on: ubuntu-22.04
     steps:
+      - uses: actions/checkout@v3
       - name: Set up Python
         uses: actions/setup-python@v4
         with: