Replace slack channel link with discord server link

[TharmiganK]

Purpose

$Subject

Related to Update Slack channel occurrences with Discord #3463

Examples

N/A

Checklist

• Linked to an issue
• Updated the changelog
• Added tests
• Updated the spec
• Checked native-image compatibility

[codecov]

Codecov Report

Base: 89.07% // Head: 89.07% // No change to project coverage 👍

Coverage data is based on head (f5f939c) compared to base (8bee10a).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##               main      #27   +/-   ##
=========================================
  Coverage     89.07%   89.07%           
  Complexity      117      117           
=========================================
  Files            16       16           
  Lines           238      238           
  Branches         42       42           
=========================================
  Hits            212      212           
  Misses           14       14           
  Partials         12       12           

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