chore(maintainers): Change helm chart maintainers to argoproj (#1426)

Standardize helm chart maintainer to be

```yaml
maintainers:
  - name: argoproj
    url: https://argoproj.github.io/
```

We'll use CODEOWNERS to notify individual maintainers about PRs to the helm charts and will be our source-of-truth for that information

Signed-off-by: jmeridth <jmeridth@gmail.com>

charts/argo-rollouts/Chart.yaml

@@ -1,14 +1,13 @@
 apiVersion: v2
-appVersion: "v1.2.0"
+appVersion: "v1.2.2"
 description: A Helm chart for Argo Rollouts
 name: argo-rollouts
-version: 2.19.0
+version: 2.19.2
 icon: https://argoproj.github.io/argo-rollouts/assets/logo.png
 home: https://github.com/argoproj/argo-helm
 maintainers:
-  - name: alexmt
-  - name: dthomson25
-  - name: jessesuen
+  - name: argoproj
+    url: https://argoproj.github.io/
 annotations:
   artifacthub.io/changes: |
-    - "[Added]: flags to disable the creation of ClusterRoles/ClusterRoleBindings when run in cluster mode "
+    - "[Changed]: Helm chart maintainers standardized to argoproj"

charts/argo-rollouts/README.md

@@ -175,4 +175,4 @@ Autogenerated from chart metadata using [helm-docs](https://github.com/norwoodj/
 [Tolerations]: https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/
 [priorityClassName]: https://kubernetes.io/docs/concepts/scheduling-eviction/pod-priority-preemption/
 [Pod Disruption Budget]: https://kubernetes.io/docs/concepts/workloads/pods/disruptions/#pod-disruption-budgets
-[values.yaml]: https://github.com/argoproj/argo-helm/blob/argo-rollouts-2.19.0/charts/argo-rollouts/values.yaml
+[values.yaml]: https://github.com/argoproj/argo-helm/blob/argo-rollouts-2.19.2/charts/argo-rollouts/values.yaml