chore(deps): bump ruamel-yaml from 0.18.6 to 0.18.15

Bumps ruamel-yaml from 0.18.6 to 0.18.15.

---
updated-dependencies:
- dependency-name: ruamel-yaml
  dependency-version: 0.18.15
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,3 +1,3 @@
 jinja2==3.1.4
 python-dotenv==1.0.1
-ruamel.yaml==0.18.6
+ruamel.yaml==0.18.15