chore: Prepare release 2.2.0

[fsbraun]

Description

Version 2.2 will add:

• Bulk delete action for versions
• "Delete Translation" menu for django CMS 4.1.5+
• Auto-complete field for the model version admin

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.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request prepares the project for the release of version 2.2.0. The changes include updating the version number to 2.2.0 in djangocms_versioning/__init__.py and updating the changelog.

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

File-Level Changes

Change	Details	Files
Update version number	Changed version from 2.1.0 to 2.2.0	djangocms_versioning/__init__.py
Update changelog	Added release notes for version 2.2.0	CHANGELOG.rst

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.63%. Comparing base (8494eaf) to head (a5f271f).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #445   +/-   ##
=======================================
  Coverage   90.63%   90.63%           
=======================================
  Files          72       72           
  Lines        2702     2702           
  Branches      314      314           
=======================================
  Hits         2449     2449           
  Misses        179      179           
  Partials       74       74           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[sourcery-ai]

Hey @fsbraun - I've reviewed your changes - here's some feedback:

Overall Comments:

• Please complete the PR checklist in the description to confirm you've followed all required processes for this release.

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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