fix(bench): fix the compilation failure

[tkrs]

No description provided.

[codecov]

Codecov Report

Merging #19 into master will decrease coverage by 0.35%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master     #19      +/-   ##
=========================================
- Coverage   63.15%   62.8%   -0.36%     
=========================================
  Files          16      16              
  Lines         285     285              
  Branches        6       6              
=========================================
- Hits          180     179       -1     
- Misses        105     106       +1

Impacted Files	Coverage Δ
core/src/main/scala/agni/Serializer.scala	93.15% <0%> (-1.37%)	⬇️

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