Bump test-kitchen from 3.5.0 to 3.6.0 in /omnibus

Bumps [test-kitchen](https://github.com/test-kitchen/test-kitchen) from 3.5.0 to 3.6.0.
- [Release notes](https://github.com/test-kitchen/test-kitchen/releases)
- [Changelog](https://github.com/test-kitchen/test-kitchen/blob/main/CHANGELOG.md)
- [Commits](test-kitchen/test-kitchen@v3.5.0...v3.6.0)

---
updated-dependencies:
- dependency-name: test-kitchen
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

omnibus/Gemfile.lock

@@ -53,8 +53,6 @@ GEM
  aws-sigv4 (1.8.0)
  aws-eventstream (~> 1, >= 1.0.2)
  bcrypt_pbkdf (1.1.0)
- bcrypt_pbkdf (1.1.0-x64-mingw32)
- bcrypt_pbkdf (1.1.0-x86-mingw32)
  berkshelf (8.0.7)
  chef (>= 15.7.32)
  chef-config
@@ -272,7 +270,7 @@ GEM
  mixlib-cli (2.1.8)
  mixlib-config (3.0.27)
  tomlrb
- mixlib-install (3.12.27)
+ mixlib-install (3.12.28)
  mixlib-shellout
  mixlib-versioning
  thor
@@ -395,7 +393,7 @@ GEM
  strings-ansi (0.2.0)
  structured_warnings (0.4.0)
  syslog-logger (1.6.8)
- test-kitchen (3.5.0)
+ test-kitchen (3.6.0)
  bcrypt_pbkdf (~> 1.0)
  chef-utils (>= 16.4.35)
  ed25519 (~> 1.2)
@@ -452,7 +450,7 @@ GEM
  unf (0.1.4)
  unf_ext
  unf_ext (0.0.8.2)
- unicode-display_width (2.4.2)
+ unicode-display_width (2.5.0)
  unicode_utils (1.4.0)
  uuidtools (2.2.0)
  vault (0.17.0)