Update Slack links

CONTRIBUTING.md

@@ -25,7 +25,7 @@ discussions.
 
 ### Slack
 
-For real-time chat, you can join the **#netbox** Slack channel on [NetDev Community](https://join.slack.com/t/netdev-community/shared_invite/zt-mtts8g0n-Sm6Wutn62q_M4OdsaIycrQ).
+For real-time chat, you can join the **#netbox** Slack channel on [NetDev Community](https://slack.netbox.dev/).
 Unfortunately, the Slack channel does not provide long-term retention of chat
 history, so try to avoid it for any discussions would benefit from being
 preserved for future reference.

README.md

@@ -15,7 +15,7 @@ The complete documentation for NetBox can be found at [Read the Docs](https://ne
 ### Discussion
 
 * [GitHub Discussions](https://github.com/netbox-community/netbox/discussions) - Discussion forum hosted by GitHub; ideal for Q&A and other structured discussions
-* [Slack](https://join.slack.com/t/netdev-community/shared_invite/zt-mtts8g0n-Sm6Wutn62q_M4OdsaIycrQ) - Real-time chat hosted by the NetDev Community; best for unstructured discussion or just hanging out
+* [Slack](https://slack.netbox.dev/) - Real-time chat hosted by the NetDev Community; best for unstructured discussion or just hanging out
 * [Google Group](https://groups.google.com/g/netbox-discuss) - Legacy mailing list; slowly being replaced by GitHub discussions
 
 ### Build Status

docs/development/index.md

@@ -8,7 +8,7 @@ There are several official forums for communication among the developers and com
 
 * [GitHub issues](https://github.com/netbox-community/netbox/issues) - All feature requests, bug reports, and other substantial changes to the code base **must** be documented in an issue.
 * [GitHub Discussions](https://github.com/netbox-community/netbox/discussions) - The preferred forum for general discussion and support issues. Ideal for shaping a feature request prior to submitting an issue.
-* [#netbox on NetDev Community Slack](https://join.slack.com/t/netdev-community/shared_invite/zt-mtts8g0n-Sm6Wutn62q_M4OdsaIycrQ) - Good for quick chats. Avoid any discussion that might need to be referenced later on, as the chat history is not retained long.
+* [#netbox on NetDev Community Slack](https://slack.netbox.dev/) - Good for quick chats. Avoid any discussion that might need to be referenced later on, as the chat history is not retained long.
 * [Google Group](https://groups.google.com/g/netbox-discuss) - Legacy mailing list; slowly being phased out in favor of GitHub discussions.
 
 ## Governance