chore: update changelog, bump version

[fsbraun]

Description

Related resources

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Checklist

• I have opened this pull request against master
• I have added or modified the tests when changing logic
• I have followed the conventional commits guidelines to add meaningful information into the changelog
• I have read the contribution guidelines and I have joined #workgroup-pr-review on
  Slack to find a “pr review buddy” who is going to review my pull request.

Summary by Sourcery

Chores:

• Update the changelog to reflect recent changes and prepare for a new release.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request updates the version number in the djangocms_versioning package and adds a new entry to the CHANGELOG.rst file to reflect the version bump.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Version number updated in the djangocms_versioning package.	Changed the version number from 2.2.0 to 2.2.1.	djangocms_versioning/__init__.py
Updated the changelog to include the latest version changes.	Added a new entry to the changelog for version 2.2.1.	CHANGELOG.rst

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[sourcery-ai]

Hey @fsbraun - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.55%. Comparing base (fee0650) to head (98675ee).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #456   +/-   ##
=======================================
  Coverage   90.55%   90.55%           
=======================================
  Files          72       72           
  Lines        2720     2720           
  Branches      318      318           
=======================================
  Hits         2463     2463           
  Misses        182      182           
  Partials       75       75           

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