Bump scikit-learn from 1.3.2 to 1.4.0

Bumps [scikit-learn](https://github.com/scikit-learn/scikit-learn) from 1.3.2 to 1.4.0.
- [Release notes](https://github.com/scikit-learn/scikit-learn/releases)
- [Commits](https://github.com/scikit-learn/scikit-learn/compare/1.3.2...1.4.0)

---
updated-dependencies:
- dependency-name: scikit-learn
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements-freqai.txt

@@ -3,7 +3,7 @@
 -r requirements-plot.txt
 
 # Required for freqai
-scikit-learn==1.3.2
+scikit-learn==1.4.0
 joblib==1.3.2
 catboost==1.2.2; 'arm' not in platform_machine and python_version < '3.12'
 lightgbm==4.2.0

requirements-hyperopt.txt

@@ -3,6 +3,6 @@
 
 # Required for hyperopt
 scipy==1.11.4
-scikit-learn==1.3.2
+scikit-learn==1.4.0
 ft-scikit-optimize==0.9.2
 filelock==3.13.1