Prepare v0.12.3

[vearutop]

Description

This PR updates CHANGELOG to issue a new patch release.

Motivation & context

We have a few changes/fixes that can be released.

Type of change

Docs.

Note to other contributors

No note.

Update required of cucumber.io/docs

No update.

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• I have added tests to cover my changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

[codecov]

Codecov Report

Merging #451 (024acb4) into main (95278df) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #451   +/-   ##
=======================================
  Coverage   81.31%   81.31%           
=======================================
  Files          27       27           
  Lines        2178     2178           
=======================================
  Hits         1771     1771           
  Misses        313      313           
  Partials       94       94           

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