Bump urllib3 from 2.0.4 to 2.0.7 in /docs

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.0.4 to 2.0.7.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.0.4...2.0.7)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -33,5 +33,5 @@ sphinxcontrib-qthelp==1.0.5
 sphinxcontrib-seqdiag==3.0.0
 sphinxcontrib-serializinghtml==1.1.7
 tornado==6.4
-urllib3==2.0.4
+urllib3==2.0.7
 webcolors==1.13