Update csharp.yml

[Jesn]

csharp action workflow-> remove push to nuget job

[huan]

Could you please have a short explanation about this change?

Thank you very much!

[Jesn]

csharp.yml 之前会build csharp/Wechaty.Grpc 解决方案生成nuget包，并推送到Nuget服务器，本次修改移除了Nuget包推送到Nuget服务器的这一步操作，只验证解决方案是否报异常

[huan]

Thanks for the clarification!

According to our best practice of DevOps, I think it would be great if we could publish our package to the Nuget server after the CI passed.

However, this is a suggestion and you will make the final decision.

Should we merge this PR for now?

[huan]

ping @Jesn

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