Bump urllib3 from 2.6.2 to 2.6.3 in /docs

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.6.2 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@2.6.2...2.6.3)

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

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

Author: dependabot[bot]

docs/requirements.txt

@@ -12,8 +12,6 @@ certifi==2024.7.4
     # via requests
 charset-normalizer==3.3.2
     # via requests
-colorama==0.4.6
-    # via sphinx
 docutils==0.20.1
     # via sphinx
 idna==3.7
@@ -57,7 +55,7 @@ sphinxcontrib-qthelp==1.0.6
     # via sphinx
 sphinxcontrib-serializinghtml==1.1.9
     # via sphinx
-urllib3==2.6.2
+urllib3==2.6.3
     # via
     #   -r requirements.in
     #   requests