fix deploy workflow: install flyctl via curl instead of github action

the act runner can't clone from github.com, so install flyctl directly

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -10,8 +10,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: superfly/flyctl-action/setup-flyctl@master
+      - name: install flyctl
+        run: curl -L https://fly.io/install.sh | sh
 
-      - run: flyctl deploy --remote-only
+      - name: deploy
+        run: /root/.fly/bin/flyctl deploy --remote-only
         env:
           FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}