docs: Adding new slack link (#5028)

CODE_OF_CONDUCT.md

@@ -56,7 +56,7 @@ further defined and clarified by project maintainers.
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be
 reported by contacting the project team by messaging `@lkysow` on the
-[Atlantis Slack community](https://join.slack.com/t/atlantis-community/shared_invite/zt-9xlxtxtc-CUSKB1ATt_sQy6um~LDPNw).
+[Atlantis Slack community](https://communityinviter.com/apps/cloud-native/cncf).
 All complaints will be reviewed and investigated and will result in a response that
 is deemed necessary and appropriate to the circumstances. The project team is
 obligated to maintain confidentiality with regard to the reporter of an incident.

README.md

@@ -23,7 +23,7 @@
 * How to get started: [www.runatlantis.io/guide](https://www.runatlantis.io/guide)
 * Full documentation: [www.runatlantis.io/docs](https://www.runatlantis.io/docs)
 * Download the latest release: [github.com/runatlantis/atlantis/releases/latest](https://github.com/runatlantis/atlantis/releases/latest)
-* Get help in our [Slack channel](https://join.slack.com/t/atlantis-community/shared_invite/zt-9xlxtxtc-CUSKB1ATt_sQy6um~LDPNw)
+* Get help in our [Slack channel](https://communityinviter.com/apps/cloud-native/cncf)
 * Start Contributing: [CONTRIBUTING.md](CONTRIBUTING.md)
 
 ## What is Atlantis?

runatlantis.io/index.md

@@ -18,7 +18,7 @@ hero:
       link: /blog/2017/introducing-atlantis
     - theme: alt
       text: Join us on Slack
-      link: https://join.slack.com/t/atlantis-community/shared_invite/zt-9xlxtxtc-CUSKB1ATt_sQy6um~LDPNw
+      link: https://communityinviter.com/apps/cloud-native/cncf
 
 features:
   - title: Fewer Mistakes