Tweak release building

[arnested]

• chglog(1) can default to the owner, no need to be explicit
• Let the goreleaser-action default to the correct version of goreleaser
• No need to run go mod download explicitly anymore
• Let GitHub itself generate the release notes
• Update copyright years

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 28.32%. Comparing base (f58e697) to head (c588982).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #471   +/-   ##
=======================================
  Coverage   28.32%   28.32%           
=======================================
  Files           7        7           
  Lines         286      286           
=======================================
  Hits           81       81           
  Misses        203      203           
  Partials        2        2           

☔ 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.