Update the CHANGELOG for 6.6.3

[williamdes]

No description provided.

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: +3.73% 🎉

Comparison is base (96985b9) 69.34% compared to head (32e218d) 73.08%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #643      +/-   ##
==========================================
+ Coverage   69.34%   73.08%   +3.73%     
==========================================
  Files         128      127       -1     
  Lines       27027    21873    -5154     
==========================================
- Hits        18742    15985    -2757     
+ Misses       8285     5888    -2397     

Flag	Coverage Δ
php-5.3-ubuntu-latest	?
php-5.4-ubuntu-latest	?
php-5.5-ubuntu-latest	?
php-5.6-ubuntu-latest	?
php-7.0-ubuntu-latest	?
php-7.1-ubuntu-latest	73.07% <ø> (?)
php-7.2-ubuntu-latest	72.96% <ø> (ø)
php-7.4-ubuntu-latest	?
php-8.1-ubuntu-latest	?

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see 82 files with indirect coverage changes

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