fix(protocol-designer) add 8.4.3 announcement

[koji]

Overview

add 8.4.3 announcement

close AUTH-1481 and AUTH-1509

Test Plan and Hands on Testing

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2. click Release notes

Changelog

Review requests

Risk assessment

low

[codecov]

Codecov Report

Attention: Patch coverage is 1.09890% with 90 lines in your changes missing coverage. Please review.

Project coverage is 18.62%. Comparing base (edbf200) to head (70da0eb).
Report is 2 commits behind head on chore_release-pd-8.4.3.

Files with missing lines	Patch %	Lines
.../src/organisms/AnnouncementModal/announcements.tsx	0.00%	90 Missing ⚠️

Additional details and impacted files

@@                    Coverage Diff                     @@
##           chore_release-pd-8.4.3   #17643      +/-   ##
==========================================================
- Coverage                   18.63%   18.62%   -0.01%     
==========================================================
  Files                        2743     2743              
  Lines                      211625   211706      +81     
  Branches                     6533     6534       +1     
==========================================================
  Hits                        39439    39439              
- Misses                     172186   172267      +81     

Flag	Coverage Δ
protocol-designer	18.62% <1.09%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...er/src/pages/ProtocolOverview/ProtocolMetadata.tsx	100.00% <100.00%> (ø)
.../src/organisms/AnnouncementModal/announcements.tsx	2.78% <0.00%> (-0.65%)	⬇️

[jerader]

left a few comments. should be good to merge after they are addressed and after the unit tests are passing