Bump urllib3 from 2.2.2 to 2.2.3 in /tools

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.2.2 to 2.2.3.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.2.2...2.2.3)

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

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

tools/wptrunner/requirements.txt

@@ -7,4 +7,4 @@ packaging==24.0
 pillow==10.3.0
 requests==2.32.3
 six==1.16.0
-urllib3==2.2.2
+urllib3==2.2.3