Bump urllib3 from 1.26.6 to 2.5.0 in /requirements

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.6 to 2.5.0.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.6...2.5.0)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.5.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/base.txt

@@ -15,7 +15,7 @@ Pygments==2.12.0
 python-akismet==0.4.2
 requests==2.32.4
 six==1.15.0
-urllib3==1.26.6
+urllib3==2.5.0
 whitenoise==6.1.0
 psycopg2-binary==2.9.3
 djangorestframework==3.14.0