Fix duplicate header in changelog

[isc-pbarton]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.20%. Comparing base (78b6976) to head (12183ae).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #755   +/-   ##
=======================================
  Coverage   41.20%   41.20%           
=======================================
  Files          24       24           
  Lines        3206     3206           
=======================================
  Hits         1321     1321           
  Misses       1885     1885           

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