feat(argocd-apps): Introduce chart signing (#2045)

Signed-off-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>
Co-authored-by: Aikawa <yu.croco@gmail.com>

charts/argocd-apps/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: argocd-apps
 description: A Helm chart for managing additional Argo CD Applications and Projects
 type: application
-version: 1.0.0
+version: 1.0.1
 home: https://github.com/argoproj/argo-helm
 icon: https://argo-cd.readthedocs.io/en/stable/assets/logo.png
 keywords:
@@ -13,6 +13,9 @@ maintainers:
   - name: argoproj
     url: https://argoproj.github.io/
 annotations:
+  artifacthub.io/signKey: |
+    fingerprint: 2B8F22F57260EFA67BE1C5824B11F800CD9D2252
+    url: https://argoproj.github.io/argo-helm/pgp_keys.asc
   artifacthub.io/changes: |
-    - kind: fixed
-      description: Changed the project field of the applicationset from a tpl function to a string.
+    - kind: added
+      description: Introduce chart signing