fix: ArgoCD Notifications - Deployment manifest udpateStrategy (#372)
* Helm chart contribution for argocd-notifications The following chart is a contribution from work done at https://github.com/Bandwidth/ to facilitate installing https://github.com/argoproj-labs/argocd-notifications via Helm chart based on https://github.com/argoproj-labs/argocd-notifications/blob/master/manifests/install.yaml