feat(argocd-notifications): Add ability to define security context (#1116)

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

charts/argocd-notifications/Chart.yaml

@@ -3,7 +3,7 @@ appVersion: v1.2.1
 description: A Helm chart for ArgoCD notifications, an add-on to ArgoCD.
 name: argocd-notifications
 type: application
-version: 1.7.1
+version: 1.8.0
 home: https://github.com/argoproj/argo-helm
 icon: https://argocd-notifications.readthedocs.io/en/stable/assets/logo.png
 keywords:
@@ -15,4 +15,4 @@ maintainers:
   - name: andyfeller
 annotations:
   artifacthub.io/changes: |
-    - "[Changed]: Consistent .helmignore"
+    - "[Added]: Ability to define security context for Slack bot deployment"