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] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -6,4 +6,4 @@ CacheControl < 0.13
 urllib3 < 2  # until CacheControl has a fixed release
 schema-salad >= 8.3.20220825114525, < 9
 ruamel.yaml >= 0.17.6, < 0.17.27;python_version>='3.7'
-ruamel.yaml >= 0.16.12, < 0.17.28
+ruamel.yaml >= 0.16.12, < 0.17.29