Update dependency yamale to v6 (#17)

Co-authored-by: thecluster-bot[bot] <98929874+thecluster-bot[bot]@users.noreply.github.com>

Author: thecluster-bot[bot]

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
       # renovate: datasource=github-releases depName=helm/helm
       HELM_VERSION: 3.18.6
       # renovate: datasource=pypi depName=yamale
-      YAMALE_VERSION: 4.0.4
+      YAMALE_VERSION: 6.0.0
       # renovate: datasource=pypi depName=yamllint
       YAMLLINT_VERSION: 1.27.1
     steps: