Install dependencies in CI

.gitea/workflows/ci.yml

@@ -12,6 +12,8 @@ jobs:
         uses: "https://github.com/actions/setup-python@v4"
         with:
           python-version: "3.11"
+      - name: Install dependencies
+        run: pip install -r requirements.txt
       - name: Build
         run: ./resize.py
       - name: Upload