Update README.md
New intro that matches updates to the Mattermost product.
If possible, can we also change the repo description to this?
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle.
As of 2024-05-14 a change has been implemented to enforce access token expiry. If you see higher numbers of HTTP 401 responses, please check tokens that may have expired. For more details, including how to mitigate disruption, please check our docs guide on Expired Access Tokens. If you have a support contract, you may open a support ticket for additional assistance.
New intro that matches updates to the Mattermost product.
If possible, can we also change the repo description to this?
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle.