chore: fix pana

.github/actions/pana/action.yml

@@ -42,6 +42,12 @@ runs:
             echo "Dependency $DEP not found in pubspec.yaml, skipping override."
           fi
         done
+    
+    - name: Install Flutter
+      uses: subosito/flutter-action@v2
+      with:
+        channel: stable
+        cache: true
 
     - name: Install Pana
       working-directory: ${{ inputs.working_directory }}