Fix selector label incompatibility

[AnchorArray]

Guardrails 0.3.0 Deployment:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: guardrails
  labels:
    helm.sh/chart: guardrails-0.3.0
    app.kubernetes.io/name: guardrails
    app.kubernetes.io/instance: guardrails
    app.kubernetes.io/version: "2.0.1"
    app.kubernetes.io/managed-by: Helm
spec:
  revisionHistoryLimit: 1
  replicas: 4
  selector:
    matchLabels:
      app.kubernetes.io/name: guardrails                 # The selector labels used by 0.3.0 version of the chart (immutable)
      app.kubernetes.io/instance: guardrails
  template:
    metadata:
      labels:
        helm.sh/chart: guardrails-0.3.0
        app.kubernetes.io/name: guardrails
        app.kubernetes.io/instance: guardrails
        app.kubernetes.io/version: "2.0.1"
        app.kubernetes.io/managed-by: Helm

Guardrails 0.5.0 Deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  name: guardrails
  labels:
    helm.sh/chart: guardrails-0.5.0
    app.kubernetes.io/version: "2.2.2"
    app.kubernetes.io/managed-by: Helm
spec:
  revisionHistoryLimit: 1
  replicas: 4
  selector:
    matchLabels:
      app: guardrails            # Changing to this label from the 0.3.0 configuration requires recreating the deployment
  template:
    metadata:
      labels:
        helm.sh/chart: guardrails-0.5.0
        app.kubernetes.io/version: "2.2.2"
        app.kubernetes.io/managed-by: Helm
        app: guardrails
        app.kubernetes.io/name: guardrails
        app.kubernetes.io/instance: guardrails

Guardrails 0.5.1 Deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  name: guardrails
  labels:
    helm.sh/chart: guardrails-0.5.1
    app.kubernetes.io/version: "2.2.2"
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/name: guardrails
    app.kubernetes.io/instance: guardrails
spec:
  revisionHistoryLimit: 1
  replicas: 4
  selector:
    matchLabels:
      app.kubernetes.io/name: guardrails           # Reverted change and handled cache deployment labels separately
      app.kubernetes.io/instance: guardrails
  template:
    metadata:
      labels:
        helm.sh/chart: guardrails-0.5.1
        app.kubernetes.io/version: "2.2.2"
        app.kubernetes.io/managed-by: Helm
        app.kubernetes.io/name: guardrails
        app.kubernetes.io/instance: guardrails