feat(argo-rollouts): Add extra manifests option to chart (#1366)

* feat(argo-rollouts): Add extra manifests option to chart

Signed-off-by: Vlad Voloshyn <vladvoloshyn12@gmail.com>

* fix indent

Signed-off-by: Vlad Voloshyn <vladvoloshyn12@gmail.com>

* Apply suggestions from code review

Signed-off-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

Co-authored-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

charts/argo-rollouts/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: "v1.2.0"
 description: A Helm chart for Argo Rollouts
 name: argo-rollouts
-version: 2.17.0
+version: 2.18.0
 icon: https://argoproj.github.io/argo-rollouts/assets/logo.png
 home: https://github.com/argoproj/argo-helm
 maintainers:
@@ -11,4 +11,4 @@ maintainers:
   - name: jessesuen
 annotations:
   artifacthub.io/changes: |
-    - "[Added]: Ability to inject custom environment variables"
+    - "[Added]: Additional manifests to deploy within the chart"