chore: update newsletter link

[vinckr]

Related issue(s)

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security vulnerability, I
  confirm that I got the approval (please contact
  [email protected]) from the maintainers to push
  the changes.
• I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

Further Comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.37%. Comparing base (6ce3068) to head (b075efc).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4011      +/-   ##
==========================================
+ Coverage   78.35%   78.37%   +0.01%     
==========================================
  Files         370      370              
  Lines       26098    26098              
==========================================
+ Hits        20450    20455       +5     
+ Misses       4090     4086       -4     
+ Partials     1558     1557       -1     

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