Align Flutter CI with small-peers-ci

Author: pvditto

.github/workflows/update-sdk-versions.yml

@@ -43,10 +43,10 @@ jobs:
           java-version: "17"
 
       - name: Setup Flutter
-        uses: subosito/flutter-action@v2
+        uses: subosito/flutter-action@v2.16.0
         with:
-          flutter-version: '3.x'
-          channel: 'stable'
+          channel: "stable"
+          cache: true
 
       - name: Setup Rust
         uses: dtolnay/rust-toolchain@stable