fix: add Python setup

.gitea/workflows/ci.yml

@@ -7,4 +7,9 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 1
-      - run: echo "CI passed"
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - run: echo "Python setup done"