Bump scipy from 1.5.4 to 1.6.0 (#2060)

Bumps [scipy](https://github.com/scipy/scipy) from 1.5.4 to 1.6.0.
- [Release notes](https://github.com/scipy/scipy/releases)
- [Commits](https://github.com/scipy/scipy/compare/v1.5.4...v1.6.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -19,7 +19,7 @@ python-hglib==2.6.2
 requests==2.25.1
 rs_parsepatch==0.3.3
 scikit-learn==0.23.2
-scipy==1.5.4
+scipy==1.6.0
 shap[plots]==0.37.0
 tabulate==0.8.7
 taskcluster==38.0.6