chore: update gnark dependency

[ivokub]

Update gnark dependency to include pairing check optimizations (implicit G2 membership check inside Miller loop subroutine). Reduces the Miller loop circuit size by 10-15% depending on the number of input instances configured.

I have ran the full testsuite for ecpair glue

Checklist

• I wrote new tests for my new core changes.
• I have successfully ran tests, style checker and build against my new changes locally.
• I have informed the team of any breaking changes if there are any.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.89%. Comparing base (d01ef99) to head (38c57ff).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #580   +/-   ##
=========================================
  Coverage     68.89%   68.89%           
  Complexity     1186     1186           
=========================================
  Files           327      327           
  Lines         13128    13128           
  Branches       1317     1317           
=========================================
  Hits           9044     9044           
  Misses         3535     3535           
  Partials        549      549           

Flag	Coverage Δ		*Carryforward flag
hardhat	98.74% <ø> (ø)
kotlin	66.53% <ø> (ø)		Carriedforward from d01ef99

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