Bump urllib3 from 2.6.0 to 2.6.3 in /docs

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.6.0 to 2.6.3.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.6.0...2.6.3)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.6.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -76,6 +76,6 @@ types-freezegun==1.1.10 ; python_version >= "3.9" and python_version < "3.15"
 types-setuptools==65.3.0 ; python_version >= "3.9" and python_version < "3.15"
 typing-extensions==4.3.0 ; python_version >= "3.9" and python_version < "3.15"
 universal-startfile==0.2 ; python_version >= "3.9" and python_version < "3.15"
-urllib3==2.6.0 ; python_version >= "3.9" and python_version < "3.15"
+urllib3==2.6.3 ; python_version >= "3.9" and python_version < "3.15"
 watchdog==2.1.9 ; python_version >= "3.9" and python_version < "3.15"
 zipp==3.19.1 ; python_version >= "3.9" and python_version < "3.15"