Bump scikit-learn from 0.22.1 to 0.23.2

Bumps [scikit-learn](https://github.com/scikit-learn/scikit-learn) from 0.22.1 to 0.23.2.
- [Release notes](https://github.com/scikit-learn/scikit-learn/releases)
- [Commits](scikit-learn/scikit-learn@0.22.1...0.23.2)

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

Author: dependabot[bot]

requirements.txt

@@ -2,7 +2,7 @@
 numpy==1.18.1
 scipy==1.4.1
 matplotlib==3.3.1
-scikit-learn==0.22.1
+scikit-learn==0.23.2
 six==1.15.0
 Pillow==7.2.0
 tqdm==4.45.0