Update test_csharp.yml

.github/workflows/test_csharp.yml

@@ -65,7 +65,7 @@ jobs:
             /bin/bash -c '
             DOTNET_CLI_TELEMETRY_OPTOUT=true
             DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true
-            dotnet publish -c Release -f net60 /workspace/csharp/src/Google.Protobuf.Test/Google.Protobuf.Test.csproj'
+            dotnet publish -c Release -f net6.0 /workspace/csharp/src/Google.Protobuf.Test/Google.Protobuf.Test.csproj'
 
       - name: Use an actual aarch64 docker image to run protobuf C# tests with an emulator
         # "dotnet vstest" allows running tests from a pre-built project.
@@ -83,4 +83,4 @@ jobs:
             /bin/bash -c '
             DOTNET_CLI_TELEMETRY_OPTOUT=true
             DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true
-            dotnet vstest /workspace/csharp/src/Google.Protobuf.Test/bin/Release/net60/publish/Google.Protobuf.Test.dll'
+            dotnet vstest /workspace/csharp/src/Google.Protobuf.Test/bin/Release/net6.0/publish/Google.Protobuf.Test.dll'