chore(ci): Fixing CI

[mm-zk]

What ❔

• Fixing compilation error in Cargo
• and clippy warning

Why ❔

• To make CI pass

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (83ac4cf) 32.11% compared to head (e82b7e3) 32.09%.

❗ Current head e82b7e3 differs from pull request most recent head 0275323. Consider uploading reports for the commit 0275323 to get more accurate results

Additional details and impacted files

@@                  Coverage Diff                   @@
##           boojum-integration     #150      +/-   ##
======================================================
- Coverage               32.11%   32.09%   -0.03%     
======================================================
  Files                     482      482              
  Lines                   25923    25923              
======================================================
- Hits                     8326     8320       -6     
- Misses                  17597    17603       +6     

Files	Coverage Δ
core/lib/mini_merkle_tree/src/lib.rs	71.15% <ø> (ø)

... and 1 file with indirect coverage changes

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