Bump sh from 2.1.0 to 2.2.1

Bumps [sh](https://github.com/amoffat/sh) from 2.1.0 to 2.2.1.
- [Release notes](https://github.com/amoffat/sh/releases)
- [Changelog](https://github.com/amoffat/sh/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/amoffat/sh/compare/2.1.0...2.2.1)

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

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

requirements.txt

@@ -2,7 +2,7 @@ cement==2.10.14
 pynginxconfig==0.3.4
 PyMySQL==1.1.1
 psutil==6.1.0
-sh==2.1.0
+sh==2.2.1
 SQLAlchemy==1.4.54
 requests>=2.20.0
 distro==1.9.0