Bump urllib3 from 1.25.8 to 1.26.5

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.8 to 1.26.5.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.25.8...1.26.5)

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

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

Author: dependabot[bot]

requirements.txt

@@ -28,4 +28,4 @@ six==1.14.0
 sqlparse==0.3.1
 stripe==2.43.0
 tornado==6.0.3
-urllib3==1.25.8
+urllib3==1.26.5