Bump requests from 2.27.1 to 2.31.0 in /tests

Bumps [requests](https://github.com/psf/requests) from 2.27.1 to 2.31.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.27.1...v2.31.0)

---
updated-dependencies:
- dependency-name: requests
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tests/requirements.colab.2023.04.txt

@@ -17,7 +17,7 @@ pandas == 1.5.3
 pandas-datareader == 0.10.0
 pytest == 7.2.2
 pytest-xdist
-requests == 2.27.1
+requests == 2.31.0
 scikit-learn == 1.2.2
 scipy == 1.10.1
 seaborn == 0.12.2