chore(argo-cd): Update dependency argoproj/argo-cd to v2.12.6 (#2984)

Signed-off-by: argoproj-renovate[bot] <161757507+argoproj-renovate[bot]@users.noreply.github.com>
Co-authored-by: argoproj-renovate[bot] <161757507+argoproj-renovate[bot]@users.noreply.github.com>

charts/argo-cd/Chart.yaml

@@ -1,9 +1,9 @@
 apiVersion: v2
-appVersion: v2.12.5
+appVersion: v2.12.6
 kubeVersion: ">=1.25.0-0"
 description: A Helm chart for Argo CD, a declarative, GitOps continuous delivery tool for Kubernetes.
 name: argo-cd
-version: 7.6.11
+version: 7.6.12
 home: https://github.com/argoproj/argo-helm
 icon: https://argo-cd.readthedocs.io/en/stable/assets/logo.png
 sources:
@@ -27,4 +27,4 @@ annotations:
     url: https://argoproj.github.io/argo-helm/pgp_keys.asc
   artifacthub.io/changes: |
     - kind: changed
-      description: Bump argo-cd to v2.12.5
+      description: Bump argo-cd to v2.12.6