chore(deps): update helm release sloth to 0.15.0

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gitops/argocd/charts/reliability/sloth/Chart.yaml

@@ -10,4 +10,4 @@ appVersion: 1.0.0
 dependencies:
 - name: sloth
   repository: https://slok.github.io/sloth
-  version: 0.7.0
+  version: 0.15.0