Bump urllib3 from 1.26.11 to 1.26.17 in /requirements (#540)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.11 to 1.26.17.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.11...1.26.17)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: indirect
...

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

requirements/dev.txt

@@ -144,7 +144,7 @@ sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
 tox==4.11.0
     # via -r dev.in
-urllib3==1.26.11
+urllib3==1.26.17
     # via requests
 virtualenv==20.24.4
     # via

requirements/docs.txt

@@ -67,5 +67,5 @@ sphinxcontrib-qthelp==1.0.3
     # via sphinx
 sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
-urllib3==1.26.11
+urllib3==1.26.17
     # via requests