chore: upgrade frontend-component-header 6.6.0

[MaxFrank13]

Upgrades @edx/frontend-component-header to version 6.6.0

This is a replacement for the closed renovate PR

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.60%. Comparing base (b63a400) to head (2bae1bc).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #709   +/-   ##
=======================================
  Coverage   97.60%   97.60%           
=======================================
  Files         152      152           
  Lines        1337     1337           
  Branches      233      232    -1     
=======================================
  Hits         1305     1305           
  Misses         31       31           
  Partials        1        1           

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