Check available dotnet version

Former-commit-id: c444230f0d

.github/workflows/ci.yml

@@ -18,8 +18,6 @@ jobs:
     - name: Prepare FFMpeg
       run: sudo apt-get update && sudo apt-get install -y ffmpeg
     - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
-      with:
-        dotnet-version: 5.0
+      run: dotnet --version
     - name: Test with dotnet
       run: dotnet test --logger GitHubActions

.github/workflows/release.yml

@@ -9,9 +9,7 @@ jobs:
     steps:
     - uses: actions/checkout@v1
     - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
-      with:
-        dotnet-version: 5.0
+      run: dotnet --version
     - name: Build solution
       run: dotnet build --output build
     - name: Publish NuGet package