Update ruamel-yaml requirement

Updates the requirements on [ruamel-yaml](https://sourceforge.net/p/ruamel-yaml/code/ci/default/tree) to permit the latest version.

---
updated-dependencies:
- dependency-name: ruamel-yaml
  dependency-type: direct:production
...

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

pyproject.toml

@@ -31,7 +31,7 @@ dependencies = [
     "colorama>=0.2.5,<0.4.7",
     "docutils>=0.10,<0.20",
     "cryptography>=3.3.2,<40.0.2",
-    "ruamel.yaml>=0.15.0,<=0.17.21",
+    "ruamel.yaml>=0.15.0,<=0.18.1",
     # ruamel.yaml only requires ruamel.yaml.clib for Python versions
     # less than or equal to Python 3.10. In order to ensure we have
     # a consistent dependency closure across all Python versions,