feat: automatically roll deployments

The following patch extends the chart to automatically roll the deployment, when
one of the configurations, stored in a config map or secret, has been changed.

The implementation add annotations which triggers `helm update` or ArgoCD to
roll the deployment. Further information can be found on the official helm
website:

  https://helm.sh/docs/howto/charts_tips_and_tricks/#automatically-roll-deployments

templates/prometheus-fail2ban-exporter/daemonSet.yaml

@@ -17,6 +17,8 @@ spec:
       {{- include "prometheus-fail2ban-exporter.pod.selectorLabels" . | nindent 6 }}
   template:
     metadata:
+      annotations:
+        {{- include "prometheus-fail2ban-exporter.pod.annotations" . | nindent 8 }}
       labels:
         {{- include "prometheus-fail2ban-exporter.pod.labels" . | nindent 8 }}
     spec: