feat: support java 21

[NguyenHoangSon96]

Closes Issue

Proposed Changes

• Add support for java 21

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• Tests pass
• Commit messages are conventional
• Sign CLA (if not already signed)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.14%. Comparing base (826f5ba) to head (04b07e6).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #236   +/-   ##
=======================================
  Coverage   90.14%   90.14%           
=======================================
  Files          19       19           
  Lines        1126     1126           
  Branches      177      177           
=======================================
  Hits         1015     1015           
  Misses         41       41           
  Partials       70       70           

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[jansimonb]

LGTM