Update the ballerina platform as java21

[MohamedSabthar]

$subject

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.22%. Comparing base (c2d3599) to head (ff8793a).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #10   +/-   ##
=======================================
  Coverage   42.22%   42.22%           
=======================================
  Files           3        3           
  Lines         296      296           
  Branches       86       86           
=======================================
  Hits          125      125           
  Misses        171      171           

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