MNT: (deps): Bump traitlets from 5.1.0 to 5.1.1 in /ci
MNT: (deps): Bump traitlets from 5.1.0 to 5.1.1 in /ci

Bumps [traitlets](https://github.com/ipython/traitlets) from 5.1.0 to 5.1.1.
- [Release notes](https://github.com/ipython/traitlets/releases)
- [Commits](https://github.com/ipython/traitlets/compare/5.1.0...5.1.1)

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

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
Unidata/MetPy,Unidata/MetPy