Add PyGObject system dependencies to CI runner

The build step requires installing pulp_ostree in the GH runner.
Because of that, we need to provide PyGObject system dependencies
to the GH runner too (not only for our OCI images).

.github/workflows/build.yml

@@ -38,7 +38,7 @@ jobs:
           echo ::endgroup::
       - name: "Install OS packages"
         run: |
-          sudo apt-get install -y libgirepository1.0-dev libostree-dev
+          sudo apt-get install -y libgirepository1.0-dev libostree-dev libcairo2-dev
       - name: "Build package"
         run: |
           python3 setup.py sdist bdist_wheel --python-tag py3

template_config.yml

@@ -28,6 +28,7 @@ lint_requirements: true
 os_required_packages:
 - libgirepository1.0-dev
 - libostree-dev
+- libcairo2-dev
 parallel_test_workers: 8
 plugin_app_label: ostree
 plugin_default_branch: main