update the WG slack link
@@ -124,7 +124,7 @@ appearance, race, religion, or sexual identity and orientation.
### Slack
-Join the TiKV community on [Slack](https://join.slack.com/t/tikv-wg/shared_invite/enQtNTUyODE4ODU2MzI0LTgzZDQ3NzZlNDkzMGIyYjU1MTA0NzIwMjFjODFiZjA0YjFmYmQyOTZiNzNkNzg1N2U1MDdlZTIxNTU5NWNhNjk) - Sign up and join channels on TiKV topics that interest you.
+Join the TiKV community on [Slack](https://join.slack.com/t/tikv-wg/shared_invite/enQtNTUyODE4ODU2MzI0LWVlMWMzMDkyNWE5ZjY1ODAzMWUwZGVhNGNhYTc3MzJhYWE0Y2FjYjliYzY1OWJlYTc4OWVjZWM1NDkwN2QxNDE) - Sign up and join channels on TiKV topics that interest you.
### WeChat
