Bump urllib3 from 1.25.6 to 1.26.5

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.6 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@1.25.6...1.26.5)

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

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

Author: dependabot[bot]

requirements.txt

@@ -81,7 +81,7 @@ toml==0.10.0
 typed-ast==1.4.1
 typing-extensions==3.7.4.3
 uritemplate==3.0.1
-urllib3==1.25.6
+urllib3==1.26.5
 virtualenv==16.7.7
 wcwidth==0.1.8
 Werkzeug==0.16.0