build(ci): build pull requests against Temurin 21

[jponge]

No description provided.

[codecov]

Codecov Report

Merging #1404 (f69229e) into main (b0bfa0f) will decrease coverage by 0.04%.
Report is 3 commits behind head on main.
The diff coverage is n/a.

❗ Current head f69229e differs from pull request most recent head f014340. Consider uploading reports for the commit f014340 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1404      +/-   ##
============================================
- Coverage     89.18%   89.15%   -0.04%     
+ Complexity     3359     3357       -2     
============================================
  Files           459      459              
  Lines         13438    13438              
  Branches       1655     1655              
============================================
- Hits          11985    11980       -5     
- Misses          807      808       +1     
- Partials        646      650       +4     

see 12 files with indirect coverage changes