Update scikit-learn requirement

Updates the requirements on [scikit-learn](https://github.com/scikit-learn/scikit-learn) to permit the latest version.

Updates `scikit-learn` to 1.4.2
- [Release notes](https://github.com/scikit-learn/scikit-learn/releases)
- [Commits](scikit-learn/scikit-learn@0.24.2...1.4.2)

---
updated-dependencies:
- dependency-name: scikit-learn
  dependency-type: direct:production
  dependency-group: pip
...

Signed-off-by: dependabot[bot] <[email protected]>

learning/requirements.txt

@@ -3,5 +3,5 @@
 
 absl-py~=1.0
 numpy~=1.21
-scikit-learn~=0.24.2
+scikit-learn~=1.4.2
 scipy~=1.7