fix(pmm): cluster role indentation for included labels should be 4

[knechtionscoding]

The labels are currently incorrectly indented resulting in the labels themselves landing at the same layer as the labels key. This bumps them out 2 more to be correctly indented.

old:

---
# Source: pmm/templates/clusterrole.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: test-pmm
  namespace: bootstrapping-operator
  labels:
  helm.sh/chart: pmm-1.4.14
  app.kubernetes.io/name: pmm
  app.kubernetes.io/instance: test
  app.kubernetes.io/component: pmm-server
  app.kubernetes.io/part-of: percona-platform
  app.kubernetes.io/version: "3.5.0"
  app.kubernetes.io/managed-by: Helm

new:

# Source: pmm/templates/clusterrole.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: test-pmm
  namespace: bootstrapping-operator
  labels:
    helm.sh/chart: pmm-1.4.14
    app.kubernetes.io/name: pmm
    app.kubernetes.io/instance: test
    app.kubernetes.io/component: pmm-server
    app.kubernetes.io/part-of: percona-platform
    app.kubernetes.io/version: "3.5.0"
    app.kubernetes.io/managed-by: Helm

[it-percona-cla]

All committers have signed the CLA.

[ademidoff]

Thanks for contributing 👍

[knechtionscoding]

@ademidoff thanks for the approval! Do you merge or someone else?