fix(helm): update rook ceph group to v1.13.6

| datasource | package           | from    | to      |
| ---------- | ----------------- | ------- | ------- |
| helm       | rook-ceph         | v1.13.4 | v1.13.6 |
| helm       | rook-ceph-cluster | v1.13.4 | v1.13.6 |
| docker     | rook/ceph         | v1.13.4 | v1.13.6 |

Author: renovate[bot]

kubernetes/main/apps/storage/rook-ceph/add-ons/direct-mount/deployment.yaml

@@ -19,7 +19,7 @@ spec:
       dnsPolicy: ClusterFirstWithHostNet
       containers:
         - name: rook-direct-mount
-          image: rook/ceph:v1.13.4
+          image: rook/ceph:v1.13.6
           imagePullPolicy: IfNotPresent
           command: ["/bin/bash"]
           args: ["-m", "-c", "/usr/local/bin/toolbox.sh"]

kubernetes/main/apps/storage/rook-ceph/app/operator/helmrelease.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: rook-ceph
-      version: v1.13.4
+      version: v1.13.6
       sourceRef:
         kind: HelmRepository
         name: rook-ceph-charts

kubernetes/main/apps/storage/rook-ceph/cluster/helmrelease.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: rook-ceph-cluster
-      version: v1.13.4
+      version: v1.13.6
       sourceRef:
         kind: HelmRepository
         name: rook-ceph-charts