Upgrade deploy Action

Author: Erisa

.github/workflows/fly-deploy.yml

@@ -1,12 +1,15 @@
 name: Fly Deploy
-on: [push]
-env:
-  FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}
+on:
+  push:
+    branches:
+      - master
 jobs:
   deploy:
-      name: Deploy app
-      runs-on: ubuntu-latest
-      steps:
-        - uses: actions/checkout@v2
-        - uses: superfly/flyctl-actions/setup-flyctl@master
-        - run: flyctl deploy --remote-only
+    name: Deploy app
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: superfly/flyctl-actions/setup-flyctl@master
+      - run: flyctl deploy --remote-only
+        env:
+          FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}