feat(protocol-designer): 8.6.3 release notes

[jerader]

Overview

So far, includes a bulletpoint regarding this fix: #19989

Test Plan and Hands on Testing

review copy

Changelog

add 8.6.3 release notes

Risk assessment

low

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.99%. Comparing base (82ec056) to head (5768e3c).
⚠️ Report is 1 commits behind head on chore_release-pd-8.6.3.

Additional details and impacted files

@@                   Coverage Diff                   @@
##           chore_release-pd-8.6.3   #20000   +/-   ##
=======================================================
  Coverage                   57.99%   57.99%           
=======================================================
  Files                        3413     3413           
  Lines                      283940   283940           
  Branches                    39368    39368           
=======================================================
  Hits                       164671   164671           
  Misses                     118996   118996           
  Partials                      273      273           

Flag	Coverage Δ
protocol-designer	18.83% <ø> (ø)

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[emilyburghardt]

forgot to hit the green button and submit the review :')