fix: Slack community link

[bpmct]

Fixes #4843

[github-actions]

✨ Coder.com for PR #4864 deployed! It will be updated on every commit.

• Host: https://codercom-g0e26n1p6-codercom.vercel.app/docs/code-server
• Last deploy status: success
• Commit: 744cb8d
• Workflow status: https://github.com/coder/code-server/actions/runs/1843870108

[codecov]

Codecov Report

Merging #4864 (744cb8d) into main (3ad618d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #4864   +/-   ##
=======================================
  Coverage   69.72%   69.72%           
=======================================
  Files          29       29           
  Lines        1645     1645           
  Branches      363      363           
=======================================
  Hits         1147     1147           
  Misses        424      424           
  Partials       74       74           

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[jawnsy]

Thanks for fixing this!

[jsjoeio]

@bpmct you rock! You or @jawnsy can merge this once the branch is up to date!