docs: list new metric provider integrations (argoproj#1281)

Signed-off-by: Jason Keene <[email protected]>

Author: jasonkeene

README.md

@@ -39,7 +39,7 @@ For these reasons, in large scale high-volume production environments, a rolling
 * Customizable metric queries and analysis of business KPIs
 * Ingress controller integration: NGINX, ALB
 * Service Mesh integration: Istio, Linkerd, SMI
-* Metric provider integration: Prometheus, Wavefront, Kayenta, Web, Kubernetes Jobs
+* Metric provider integration: Prometheus, Wavefront, Kayenta, Web, Kubernetes Jobs, Datadog, New Relic
 
 ## Documentation
 To learn more about Argo Rollouts go to the [complete documentation](https://argoproj.github.io/argo-rollouts/).

docs/index.md

@@ -29,7 +29,7 @@ For these reasons, in large scale high-volume production environments, a rolling
 * Customizable metric queries and analysis of business KPIs
 * Ingress controller integration: NGINX, ALB
 * Service Mesh integration: Istio, Linkerd, SMI
-* Metric provider integration: Prometheus, Wavefront, Kayenta, Web, Kubernetes Jobs
+* Metric provider integration: Prometheus, Wavefront, Kayenta, Web, Kubernetes Jobs, Datadog, New Relic
 
 ## Quick Start