[docs] update apache fluss slack link (apache#1316)

* [docs] update apache fluss slack

* workspace link change

Author: MehulBatra

README.md

@@ -14,7 +14,7 @@
 <p align="center">
   <a href="https://github.com/alibaba/fluss/actions/workflows/ci.yaml"><img src="https://github.com/alibaba/fluss/actions/workflows/ci.yaml/badge.svg?branch=main" alt="CI"></a>
   <a href="https://github.com/alibaba/fluss/blob/main/LICENSE"><img src="https://img.shields.io/badge/license-Apache%202-4EB1BA.svg" alt="License"></a>
-  <a href="https://join.slack.com/t/fluss-hq/shared_invite/zt-33wlna581-QAooAiCmnYboJS8D_JUcYw"><img src="https://img.shields.io/badge/slack-join_chat-brightgreen.svg?logo=slack" alt="Slack"></a>
+  <a href="https://join.slack.com/t/apache-fluss/shared_invite/zt-33wlna581-QAooAiCmnYboJS8D_JUcYw"><img src="https://img.shields.io/badge/slack-join_chat-brightgreen.svg?logo=slack" alt="Slack"></a>
 </p>
 
 ## What is Apache Fluss (Incubating)?

website/community/welcome.md

@@ -44,7 +44,7 @@ Fluss has two mailing lists:
     * [Archive](https://lists.apache.org/[email protected])
 
 ## Slack
-We use the [Fluss workspace](https://fluss-hq.slack.com/) on Slack for real-time communication and collaboration. You can join the community using [this invite link](https://join.slack.com/t/fluss-hq/shared_invite/zt-33wlna581-QAooAiCmnYboJS8D_JUcYw).
+We use the [Fluss workspace](https://apache-fluss.slack.com/) on Slack for real-time communication and collaboration. You can join the community using [this invite link](https://join.slack.com/t/apache-fluss/shared_invite/zt-33wlna581-QAooAiCmnYboJS8D_JUcYw).
 
 Please note that this link may occasionally break when Slack does an upgrade. If you encounter problems using it, please let us know by creating an issue on GitHub.