ci: Prepare release of djangocms-text-ckeditor 5.1.5

[fsbraun]

What's Changed Since Last Release

• fix(settings): Extend ALLOW_TOKEN_PARSERS if custom one is provided by @DmytroLitvinov in fix(settings): Extend ALLOW_TOKEN_PARSERS if custom one is provided #654
• Remove Flash plugin in the default settings by @MacLake in Remove Flash plugin in the default settings #656
• fix: Allow for request-free context objects for testing purposes by @fsbraun in fix: Allow for request-free context objects for testing purposes #659
• Support djangocms-picture 2.0.0 and higher in create_picture_plugin by @leture in Support djangocms-picture 2.0.0 and higher in create_picture_plugin #660
• Update test matrix to include Django 5 by @protoroto in Update test matrix to include Django 5 #662

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (05f9b27) 81.79% compared to head (00fe405) 81.79%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #664   +/-   ##
=======================================
  Coverage   81.79%   81.79%           
=======================================
  Files          20       20           
  Lines         912      912           
  Branches      122      122           
=======================================
  Hits          746      746           
  Misses        138      138           
  Partials       28       28           

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