update cubecl

[louisfd]

Pull Request Template

Checklist

• Confirmed that cargo run-checks command has been executed.
• Made sure the book is up to date with changes in this PR.

Related Issues/PRs

Provide links to relevant issues and dependent PRs.

Changes

Summarize the problem being addressed and your solution.

Testing

Describe how these changes have been tested.

[laggui]

🤞 🤞

[codecov]

Codecov Report

Attention: Patch coverage is 44.44444% with 5 lines in your changes missing coverage. Please review.

Project coverage is 82.66%. Comparing base (81985bd) to head (92c848f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ates/burn-cubecl-fusion/src/matmul/optimization.rs	42.85%	4 Missing ⚠️
crates/burn-cubecl/src/kernel/matmul/base.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3304   +/-   ##
=======================================
  Coverage   82.66%   82.66%           
=======================================
  Files         995      995           
  Lines      127626   127616   -10     
=======================================
- Hits       105498   105497    -1     
+ Misses      22128    22119    -9     

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