fix(ci): restrict super-linter v7 to YAML validation only

super-linter v7 enables more linters by default (CHECKOV, JSCPD, etc.).
Explicitly set VALIDATE_YAML: true so only YAML linting runs, matching
the original v4 behavior.

Author: warren830

.github/workflows/yaml-lint.yml

@@ -36,4 +36,5 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           FILTER_REGEX_INCLUDE: workspace/(docker-compose.yml|deployment/k8s/k8s-deploy.yaml)
+          VALIDATE_YAML: true