Update GitHub Actions workflow to use latest versions of checkout, upload-artifact, and setup-java actions, and upgrade Java version to 17.

Author: A1L13N

.github/workflows/flutter-ci.yml

@@ -15,7 +15,7 @@ jobs:
         os: [ubuntu-latest]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
         with:
           channel: 'stable'
@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
         with:
           channel: 'stable'
@@ -40,7 +40,7 @@ jobs:
       - run: flutter pub get
       - run: flutter build linux
       - name: Archive Linux build
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: linux-build
           path: build/linux/x64/release/bundle
@@ -51,18 +51,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-java@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: '11'
+          java-version: '17'
       - uses: subosito/flutter-action@v2
         with:
           channel: 'stable'
       - run: flutter pub get
       - run: flutter build apk
       - name: Archive Android build
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: android-build
           path: build/app/outputs/flutter-apk/app-release.apk
@@ -73,14 +73,14 @@ jobs:
     runs-on: macos-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
         with:
           channel: 'stable'
       - run: flutter pub get
       - run: flutter build ios --release --no-codesign
       - name: Archive iOS build
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ios-build
           path: build/ios/iphoneos