build(deps): bump ruamel-yaml from 0.18.6 to 0.18.8 in /requirements

Bumps ruamel-yaml from 0.18.6 to 0.18.8.

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

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

Author: dependabot[bot]

requirements/requirements-saltbox.txt

@@ -15,5 +15,5 @@ pexpect==4.9.0
 PyMySQL==1.1.1
 pyOpenSSL==24.3.0
 requests==2.32.3
-ruamel.yaml==0.18.6
+ruamel.yaml==0.18.8
 tld==0.13