Bump ruamel-yaml from 0.18.5 to 0.18.6 (#11147)

Bumps [ruamel-yaml]() from 0.18.5 to 0.18.6.

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -5,6 +5,6 @@ jmespath==1.0.1
 MarkupSafe==2.1.3
 netaddr==1.2.1
 pbr==5.11.1
-ruamel.yaml==0.18.5
+ruamel.yaml==0.18.6
 ruamel.yaml.clib==0.2.8
 jsonschema==4.22.0