Merge pull request goharbor#7092 from idvoretskyi/patch-1

Harbor project contact information updated

README.md

@@ -53,9 +53,9 @@ Refer to **[User Guide](docs/user_guide.md)** for more details on how to use Har
 ## Community
 
 * **Twitter:** [@project_harbor](https://twitter.com/project_harbor)  
-* **User Group:** Join Harbor user email group: [harbor-users@googlegroups.com](https://groups.google.com/forum/#!forum/harbor-users) to get update of Harbor's news, features, releases, or to provide suggestion and feedback. To subscribe, send an email to [[email protected]](mailto:[email protected]) .  
-* **Developer Group:** Join Harbor developer group: [harbor-dev@googlegroups.com](https://groups.google.com/forum/#!forum/harbor-dev) for discussion on Harbor development and contribution. To subscribe, send an email to [[email protected]](mailto:[email protected]).  
-* **Slack:** Join Harbor's community for discussion and ask questions: [Cloud Native Computing Foundation](https://slack.cncf.io/), channel: #harbor and #harbor-dev
+* **User Group:** Join Harbor user email group: [harbor-users@lists.cncf.io](https://lists.cncf.io/g/harbor-users) to get update of Harbor's news, features, releases, or to provide suggestion and feedback.  
+* **Developer Group:** Join Harbor developer group: [harbor-dev@lists.cncf.io](https://lists.cncf.io/g/harbor-dev) for discussion on Harbor development and contribution.
+* **Slack:** Join Harbor's community for discussion and ask questions: [Cloud Native Computing Foundation](https://slack.cncf.io/), channel: [#harbor](https://cloud-native.slack.com/messages/harbor/) and [#harbor-dev](https://cloud-native.slack.com/messages/harbor-dev/)
 
 ## Additional Tools