chore(deps): update actions/checkout action to v7

.gitea/workflows/test-pr.yml

@@ -24,7 +24,7 @@ jobs:
           python3 -m venv /opt/venv
           /opt/venv/bin/pip install yamllint
           ln -s /opt/venv/bin/yamllint /usr/local/bin/yamllint
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: install chart dependencies
         run: helm dependency build
       - name: lint