renew slack invite link

Signed-off-by: Serban Iorga <[email protected]>

Author: Serban Iorga

README.md

@@ -172,7 +172,7 @@ You can get in touch with the Firecracker community in the following ways:
 
 - Security-related issues, see our [security policy document](SECURITY.md).
 - Chat with us on our
-  [Slack workspace](https://join.slack.com/t/firecracker-microvm/shared_invite/enQtNDY2NTUwMzQ3MDE1LWIwMzA0OWFkMTZhMTlmMDZiMmFkYjMyODMxMGQ1ZjliMzJjNjJiNWRhNWNkOGEyNmUxNmRkMjZhYTc3MmVjZjM).
+  [Slack workspace](https://join.slack.com/t/firecracker-microvm/shared_invite/zt-oxbm7tqt-GLlze9zZ7sdRSDY6OnXXHg).
   _Note: most of the maintainers are on a European time zone._
 - Open a GitHub issue in this repository.
 - Email the maintainers at