Bump sh from 2.0.5 to 2.0.6

Bumps [sh](https://github.com/amoffat/sh) from 2.0.5 to 2.0.6.
- [Changelog](https://github.com/amoffat/sh/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/amoffat/sh/compare/2.0.5...2.0.6)

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

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

requirements.txt

@@ -2,7 +2,7 @@ cement==2.10.12
 pynginxconfig==0.3.4
 PyMySQL==1.1.0
 psutil==5.9.5
-sh==2.0.5
+sh==2.0.6
 SQLAlchemy==1.4.49
 requests>=2.20.0
 distro==1.8.0