docs(argo-rollouts): add more description for notification secret creation (#2922)

* docs(argo-rollouts): add more description for secret creation

Signed-off-by: st-myk <93274808+st-myk@users.noreply.github.com>

* docs(argo-rollouts): bump chart version

Signed-off-by: st-myk <93274808+st-myk@users.noreply.github.com>

* docs(argo-rollouts): fix lint

Signed-off-by: st-myk <93274808+st-myk@users.noreply.github.com>

* docs(argo-rollouts): change reference to controller

Signed-off-by: st-myk <93274808+st-myk@users.noreply.github.com>

* docs(argo-rollouts): fix readme

Signed-off-by: Mykola Stasiuk <93274808+st-myk@users.noreply.github.com>

---------

Signed-off-by: st-myk <93274808+st-myk@users.noreply.github.com>
Signed-off-by: Mykola Stasiuk <93274808+st-myk@users.noreply.github.com>
Co-authored-by: Aikawa <yu.croco@gmail.com>

charts/argo-rollouts/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: v1.7.2
 description: A Helm chart for Argo Rollouts
 name: argo-rollouts
-version: 2.37.6
+version: 2.37.7
 home: https://github.com/argoproj/argo-helm
 icon: https://argoproj.github.io/argo-rollouts/assets/logo.png
 keywords:
@@ -18,5 +18,5 @@ annotations:
     fingerprint: 2B8F22F57260EFA67BE1C5824B11F800CD9D2252
     url: https://argoproj.github.io/argo-helm/pgp_keys.asc
   artifacthub.io/changes: |
-    - kind: changed
-      description: add loadBalancerClass field for Service resources
+    - kind: added
+      description: add description for manual secret creation