Downgrade the Ballerina Gradle plugin version

[ThisaruGuruge]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.55%. Comparing base (dc9066a) to head (f1ace1f).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #15   +/-   ##
=======================================
  Coverage   55.55%   55.55%           
=======================================
  Files           2        2           
  Lines         243      243           
  Branches       92       92           
=======================================
  Hits          135      135           
  Misses        108      108           

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