Update year in copyright notice

[jlaehne]

Progress of the PR

• Change implemented (can be split into several points),
• ready for review.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (098b669) to head (9834dfe).
Report is 20 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##             main   #229       +/-   ##
=========================================
- Coverage   99.30%      0   -99.31%     
=========================================
  Files          12      0       -12     
  Lines         576      0      -576     
=========================================
- Hits          572      0      -572     
+ Misses          4      0        -4     

☔ 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.