Bump urllib3 from 1.25.10 to 1.26.5

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.10 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@1.25.10...1.26.5)

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

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

requirements.txt

@@ -1,5 +1,5 @@
 futures == 3.3.0
 requests == 2.24.0
-urllib3 == 1.25.10
+urllib3 == 1.26.5
 ruamel.yaml==0.16.12
 six==1.15.0