[Bug]: Broken Discord invite link on atuin.sh website

### What did you expect to happen? Clicking the Discord link on the atuin.sh website should redirect users to a valid Discord server invite. ### What happened? The Discord link appears to be broken and does not redirect to a valid Discord invite, preventing users from joining the community server. ### Atuin doctor output ```yaml N/A – This issue is related to the website's Discord invite link and is not related to the Atuin CLI. Therefore, atuin doctor output is not applicable. ``` ### Code of Conduct - [x] I agree to follow this project's Code of Conduct