[CN] Request to join SkyWalking slack

[hongddd eee]

你好，我是想要参加开源之夏活动的学生，目前认领了以下issue:[Feature] Add Integration Test for
Self-Observability Metrics in `_monitoring` Group · Issue #13187
<https://github.com/apache/skywalking/issues/13187>

请添加我进入讨论频道。