Bump traitlets from 5.8.0 to 5.8.1

Bumps [traitlets](https://github.com/ipython/traitlets) from 5.8.0 to 5.8.1.
- [Release notes](https://github.com/ipython/traitlets/releases)
- [Changelog](https://github.com/ipython/traitlets/blob/main/CHANGELOG.md)
- [Commits](ipython/traitlets@v5.8.0...v5.8.1)

---
updated-dependencies:
- dependency-name: traitlets
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

test-requirements.txt

@@ -112,7 +112,7 @@ sortedcontainers==2.4.0
     # via -r test-requirements.in
 tomlkit==0.11.6
     # via pylint
-traitlets==5.8.0
+traitlets==5.8.1
     # via
     #   ipython
     #   matplotlib-inline