Updated Flutter versions for the CI and fixed incorrect ubuntu version (#103)

Author: matux

.github/workflows/ci.yml

@@ -7,17 +7,17 @@ on:
 
 jobs:
   build_android:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     name: Flutter version ${{ matrix.flutter_version }} (Android)
     strategy:
       matrix:
-        flutter_version: ['3.3.0']
+        flutter_version: ["3.10.2"]
 
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-java@v1
         with:
-          java-version: '11.x'
+          java-version: "11.x"
       - uses: subosito/flutter-action@4389e6cbc6cb8a4b18c628ff96ff90be0e926aa8
         with:
           flutter-version: ${{ matrix.flutter_version }}
@@ -87,7 +87,7 @@ jobs:
     name: Flutter version ${{ matrix.flutter_version }} (iOS)
     strategy:
       matrix:
-        flutter_version: ['3.3.0']
+        flutter_version: ["3.10.2"]
 
     steps:
       - uses: actions/checkout@v2