gtimer 类方法备注有误

[ghost]

gtimer_timer.go
gtimer.go
这两个文件, 备注有误, 应该是:
"adds a timing job after delay of delay duration."

[github-actions]

Hello @nuan1989. We like your proposal/feedback and would appreciate a contribution via a Pull Request by you or another community member. We thank you in advance for your contribution and are looking forward to reviewing it!
你好 @nuan1989。我们喜欢您的提案/反馈，并希望您或其他社区成员通过拉取请求做出贡献。我们提前感谢您的贡献，并期待对其进行审查。

[gqcn]

#2430