build(deps): update scikit-learn requirement from ==1.5.* to ==1.6.* in /requirements

[dependabot]

Updates the requirements on scikit-learn to permit the latest version.

Release notes

Sourced from scikit-learn's releases.

Scikit-learn 1.6.0

We're happy to announce the 1.6.0 release.

You can read the release highlights under https://scikit-learn.org/stable/auto_examples/release_highlights/plot_release_highlights_1_6_0.html and the long version of the change log under https://scikit-learn.org/stable/whats_new/v1.6.html

This version supports Python versions 3.9 to 3.13 and features an experimental support of free-threaded CPython.

You can upgrade with pip as usual:

pip install -U scikit-learn

The conda-forge builds can be installed using:

conda install -c conda-forge scikit-learn

Commits

• 1fecc10 trigger wheel builder [cd build]
• dcce200 link release highlights from the changelog
• 7015ee6 DOC Release Highlights for version 1.6 (#30392)
• 09c5c00 DOC Update DummyRegressor.fit docstring to be more precise (#30410)
• 4142775 DOC Fix example comment being rendered as text (#30412)
• 034b0d1 DOC Fix broken ref (#30407)
• 384aeba generate changelog
• ea2510c bump version
• ba83d16 FIX KNeighbor classes correctly set positive_only tag (#30372)
• 03d90f3 FIX test_csr_polynomial_expansion_index_overflow on [scipy-dev] (#30393)
• Additional commits viewable in compare view

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📚 Documentation preview 📚: https://torchmetrics--2862.org.readthedocs.build/en/2862/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99%. Comparing base (f1d8f53) to head (0b985e9).

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #2862      +/-   ##
=========================================
+ Coverage      69%     99%     +30%     
=========================================
  Files         346      14     -332     
  Lines       19129     176   -18953     
=========================================
- Hits        13227     175   -13052     
+ Misses       5902       1    -5901