ci: fix badges job — add REPO_TOKEN to checkout for push access

The badges job failed because the checkout step didn't include the
REPO_TOKEN secret, so git push to the badges branch had no credentials.

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.gitea/workflows/ci.yml

@@ -186,6 +186,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+          token: ${{ secrets.REPO_TOKEN }}
       - name: Set up environment
         run: make setup
       - name: Generate badge JSON files