chore: Update GitHub Actions and Flutter setup (更新 GitHub Actions 和 Flutter 配置)

- Update `actions/checkout` from v3 to v4 in `.github/workflows/release.yml`
  (更新 `.github/workflows/release.yml` 中的 `actions/checkout` 版本，从 v3 升级到 v4)
- Update `flutter-actions/setup-flutter` to use version instead of
  channel/cache settings in `.github/workflows/release.yml`
  (更新 `.github/workflows/release.yml` 中的 `flutter-actions/setup-flutter`，
  使用 version 配置替代 channel/cache 配置)
- Update `actions/download-artifact` from v3 to v4 in
  `.github/workflows/release.yml` (更新 `.github/workflows/release.yml`
  中的 `actions/download-artifact` 版本，从 v3 升级到 v4)
- Update `softprops/action-gh-release` from v1 to v2 in
  `.github/workflows/release.yml` (更新 `.github/workflows/release.yml`
  中的 `softprops/action-gh-release` 版本，从 v1 升级到 v2)

Author: CaiJingLong

.github/workflows/release.yml

@@ -46,17 +46,14 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Setup Flutter
         uses: flutter-actions/setup-flutter@v4
         with:
-          channel: stable
-          cache: true
-          cache-key: 'flutter-3.24.1'
-          cache-path: '~/.pub-cache'
+          version: 3.24.1
 
       - name: Display flutter info
         run: |
@@ -97,17 +94,14 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Setup Flutter
         uses: flutter-actions/setup-flutter@v4
         with:
-          channel: stable
-          cache: true
-          cache-key: 'flutter-3.24.1'
-          cache-path: '~/.pub-cache'
+          version: 3.24.1
 
       - name: Install dependencies
         run: |
@@ -136,13 +130,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download all artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           path: artifacts
 
       - name: Create Release
         id: create_release
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@v2
         with:
           tag_name: ${{ env.RELEASE_TAG }}
           name: Release ${{ env.RELEASE_TAG }}
@@ -163,7 +157,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download all artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           path: artifacts