Bump urllib3 from 1.25.8 to 1.26.5 in /tests

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]

tests/requirements.txt

@@ -27,6 +27,6 @@ ruamel.yaml==0.16.10
 ruamel.yaml.clib==0.2.0
 s3transfer==0.3.3
 six==1.14.0
-urllib3==1.25.8
+urllib3==1.26.5
 xmltodict==0.12.0
 yamllint==1.20.0