chore: update flutter build version (#4429)

.github/workflows/build-mobile.yml

@@ -45,7 +45,7 @@ jobs:
         uses: subosito/flutter-action@v2
         with:
           channel: "stable"
-          flutter-version: "3.13.3"
+          flutter-version: "3.13.6"
           cache: true
 
       - name: Create the Keystore

.github/workflows/static_analysis.yml

@@ -23,7 +23,7 @@ jobs:
         uses: subosito/flutter-action@v2
         with:
           channel: "stable"
-          flutter-version: "3.13.3"
+          flutter-version: "3.13.6"
 
       - name: Install dependencies
         run: dart pub get

.github/workflows/test.yml

@@ -144,7 +144,7 @@ jobs:
         uses: subosito/flutter-action@v2
         with:
           channel: "stable"
-          flutter-version: "3.13.3"
+          flutter-version: "3.13.6"
       - name: Run tests
         working-directory: ./mobile
         run: flutter test -j 1