chore(deps): bump urllib3 from 2.6.2 to 2.6.3 in /hack/api-docs (#5818)

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](https://github.com/urllib3/urllib3/compare/2.6.2...2.6.3)

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

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

hack/api-docs/requirements.txt

@@ -36,7 +36,7 @@ requests==2.32.5
 six==1.17.0
 termcolor==3.3.0
 tornado==6.5.4
-urllib3==2.6.2
+urllib3==2.6.3
 verspec==0.1.0
 watchdog==6.0.0
 zipp==3.23.0