Final Polish: Update CI for Flutter Plugin

Author: Hamas

.github/workflows/ci.yml

@@ -13,12 +13,14 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dart-lang/setup-dart@v1
+      - uses: actions/checkout@v4
+
+      - uses: subosito/flutter-action@v2
         with:
-          sdk: stable
+          channel: 'stable'
 
       - name: Install dependencies
-        run: dart pub get
+        run: flutter pub get
 
       - name: Verify formatting
         run: dart format --output=none . || true

.github/workflows/security_check.yml

@@ -9,10 +9,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dart-lang/setup-dart@v1
+      - uses: subosito/flutter-action@v2
+        with:
+          channel: 'stable'
 
       - name: Install dependencies
-        run: dart pub get
+        run: flutter pub get
 
       - name: Enforce Formatting
         run: dart format --output=none . || true