⬆️🪝 update pre-commit hooks

[pre-commit-ci]

updates:

• github.com/srstevenson/nb-clean: 3.2.0 → 3.3.0
• github.com/astral-sh/ruff-pre-commit: v0.4.8 → v0.4.9

[burgholzer]

Hey @DeborahVolpe 👋🏼
Would you please fix the newly raised warnings from ruff?
Should be a quick fix.
You can directly commit the changes to this branch/PR.
Many thanks!

[codecov]

Codecov Report

Attention: Patch coverage is 45.71429% with 19 lines in your changes missing coverage. Please review.

Project coverage is 53.1%. Comparing base (a26491e) to head (83891d0).
Report is 26 commits behind head on main.

Files with missing lines	Patch %	Lines
src/mqt/qao/constraints.py	40.7%	16 Missing ⚠️
src/mqt/qao/solvers.py	0.0%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main     #10     +/-   ##
=======================================
- Coverage   53.2%   53.1%   -0.2%     
=======================================
  Files          6       6             
  Lines       2815    2815             
=======================================
- Hits        1500    1496      -4     
- Misses      1315    1319      +4     

Flag	Coverage Δ
python	53.1% <45.7%> (-0.2%)	⬇️

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