Release notes for 2.6.0

[AdrianAtZyte]

No description provided.

[Copilot]

Pull request overview

Adds a new “2.6.0 (unreleased)” section to the project changelog to capture upcoming release highlights.

Changes:

• Add 2.6.0 (unreleased) header to CHANGES.rst
• Document Python support changes (drop 3.8, add 3.13)
• Note a fix related to datetime.utcfromtimestamp() deprecation warnings

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

You can also share your feedback on Copilot code review. Take the survey.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.07%. Comparing base (d1d3df0) to head (13fc92d).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #186      +/-   ##
==========================================
+ Coverage   94.02%   94.07%   +0.05%     
==========================================
  Files          28       28              
  Lines        1958     1958              
==========================================
+ Hits         1841     1842       +1     
+ Misses        117      116       -1     

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.