Discord Invitation is Invalid

### What did you expect to happen?

The [Getting Started](https://github.com/doomemacs/doomemacs/blob/master/docs/getting_started.org) documentation refers to an Discord invitation that is already expired.

### What actually happened?

a new invitation link that cannot expire would be appreciated for new users and people who wants to get onboard the project.

### Describe your attempts to resolve the issue

_No response_

### Steps to reproduce

Click on the aforementioned link.

### Package commit

asdw

### System Information

_No response_