Revert "fix: try building android with macos"

This reverts commit ea1cd8e.

.github/workflows/build-alpha.yml

@@ -55,7 +55,7 @@ jobs:
   android:
     name: Build CI (Android)
     needs: update_version
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
 
     steps:
       - name: Checkout code
@@ -96,15 +96,15 @@ jobs:
         run: flutter pub get
 
       - name: 解码生成 jks
-        run: echo $KEYSTORE_BASE64 | base64 -d > android/app/vvex.jks
+        run: echo $KEYSTORE_BASE64 | base64 -di > android/app/vvex.jks
         env:
             KEYSTORE_BASE64: ${{ secrets.KEYSTORE_BASE64 }}
 
       - name: 更新版本号
         id: version
         run: |
           # 更新pubspec.yaml文件中的版本号
-          sed -i "" "s/version: .*/version: ${{ needs.update_version.outputs.new_version }}/g" pubspec.yaml
+          sed -i "s/version: .*/version: ${{ needs.update_version.outputs.new_version }}/g" pubspec.yaml
 
       - name: flutter build apk
         run: |