Bump urllib3 from 1.26.15 to 2.2.1

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.15 to 2.2.1.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.15...2.2.1)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

docs/requirements.txt

@@ -1,4 +1,4 @@
-urllib3==1.26.15 # https://github.com/readthedocs/readthedocs.org/issues/10290
+urllib3==2.2.1 # https://github.com/readthedocs/readthedocs.org/issues/10290
 sphinx==1.8.6
 sphinx-rtd-theme==1.2.0
 sphinxcontrib-napoleon==0.7