Bump urllib3 from 1.25.8 to 1.26.5 in /tutorials

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] <support@github.com>

Author: dependabot[bot]

tutorials/requirements.txt

@@ -57,7 +57,7 @@ testpath==0.4.4
 tornado==6.0.4
 traitlets==4.3.3
 transforms3d==0.3.1
-urllib3==1.25.8
+urllib3==1.26.5
 wcwidth==0.1.9
 webencodings==0.5.1
 widgetsnbextension==3.5.1