Update Helm release cert-manager to v1.15.3

Author: renovate[bot]

apps/argocd/base/networking/cert-manager.yaml

@@ -7,7 +7,7 @@ spec:
   source:
     repoURL: https://charts.jetstack.io
     chart: cert-manager
-    targetRevision: v1.14.5
+    targetRevision: v1.15.3
     helm:
       releaseName: cert-manager
       values: |