fix CI

.forgejo/workflows/update.yml

@@ -27,6 +27,11 @@ jobs:
           persist-credentials: false # otherwise, the token used is the GITHUB_TOKEN, instead of your personal access token.
           fetch-depth: 0 # otherwise, there would be errors pushing refs to the destination repository.
 
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+          cache: "pip"
+
       - name: Update fonts
         run: ./update.sh