Link to slack invite is dead

[pombredanne]

in https://aboutcode.readthedocs.io/en/latest/contributing.html the link to a Slack invite is dead.
We need to craft a non-expiring link and use it here.

[nilaygit-10721]

can you provide me slack link

[mukulraj-web]

can you provide the slack link

[Arjun-3105]

Hi @pombredanne,

I noticed that the Slack invite link in the contributing guidelines is currently broken. I’d like to take up this issue and resolve it.

Proposed Solution:

1. Generate a new, non-expiring Slack invite link.
2. Update the relevant section in the documentation to include this link.
3. Test the updated documentation to ensure the new link is functional.

Kindly assign this issue to me, and I’ll ensure it’s resolved promptly. Looking forward to your approval.