Bump urllib3 from 1.25.9 to 1.25.10

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.9 to 1.25.10.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/1.25.10/CHANGES.rst)
- [Commits](urllib3/urllib3@1.25.9...1.25.10)

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

requirements.txt

@@ -30,7 +30,7 @@ six==1.15.0
 transaction==3.0.0
 translationstring==1.4
 ujson==3.0.0
-urllib3==1.25.9
+urllib3==1.25.10
 venusian==3.0.0
 waitress==1.4.4
 WebOb==1.8.6