CI: (deps): Bump flake8-pie from 0.15.0 to 0.16.0 in /ci
CI: (deps): Bump flake8-pie from 0.15.0 to 0.16.0 in /ci

Bumps [flake8-pie](https://github.com/sbdchd/flake8-pie) from 0.15.0 to 0.16.0.
- [Release notes](https://github.com/sbdchd/flake8-pie/releases)
- [Commits](https://github.com/sbdchd/flake8-pie/commits)

---
updated-dependencies:
- dependency-name: flake8-pie
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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