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 52.78%. Comparing base (157ec14) to head (c5ef05f).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #15   +/-   ##
=======================================
  Coverage   52.78%   52.78%           
=======================================
  Files           2        2           
  Lines         233      233           
  Branches       76       76           
=======================================
  Hits          123      123           
  Misses        110      110           

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