chore: update leanimt sol version

[vplasencia]

Description

This PR updates the @zk-kit/lean-imt.sol version after this issue was solved in the LeanIMT Solidity implementation: zk-kit/zk-kit.solidity#48

Checklist

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have run yarn format and yarn lint without getting any errors
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Important

We do not accept minor grammatical fixes (e.g., correcting typos, rewording sentences) unless they significantly improve clarity in technical documentation. These contributions, while appreciated, are not a priority for merging. If there is a grammatical error feel free to message the team.