release: prepare analytics 5.2.0

[github-actions]

Release analytics 5.2.0

This PR prepares the analytics module for release.

Changes

• Bumps version to 5.2.0 (in pyproject.toml and/or its referenced version file)
• Updates CHANGELOG.md with a new section since the last v* tag
• Updates README.md version header

After merging

1. Push tag v5.2.0 from the merge commit on master to trigger the publish workflow:

   git checkout master && git pull
   git tag v5.2.0
   git push origin v5.2.0
   

2. The publish workflow creates a draft GitHub release and publishes to PyPI via Trusted Publishing. Review and publish the GitHub release after the workflow finishes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.79%. Comparing base (2fd717c) to head (de3cb45).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #182   +/-   ##
=======================================
  Coverage   95.79%   95.79%           
=======================================
  Files          13       13           
  Lines        2259     2259           
  Branches      129      129           
=======================================
  Hits         2164     2164           
  Misses         62       62           
  Partials       33       33           

Flag	Coverage Δ
openfeature-provider	52.00% <100.00%> (ø)

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