Replace slack channel with discord

[kalaiyarasiganeshalingam]

Purpose

$Subject

Related to ballerina-platform/ballerina-library#3463

Examples

Checklist

• Linked to an issue
• Updated the changelog
• Added tests
• Updated the spec

[codecov]

Codecov Report

Base: 88.24% // Head: 88.24% // No change to project coverage 👍

Coverage data is based on head (032a8c7) compared to base (da597ed).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #462   +/-   ##
=========================================
  Coverage     88.24%   88.24%           
  Complexity      215      215           
=========================================
  Files             8        8           
  Lines           817      817           
  Branches        284      284           
=========================================
  Hits            721      721           
  Misses           56       56           
  Partials         40       40           

Impacted Files	Coverage Δ
...o/ballerina/stdlib/xmldata/utils/XmlDataUtils.java	94.04% <0.00%> (ø)

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