cert-manager: 1.19.6 -> 1.20.3

Change-Id: Iabb070751250884fca8064f8b27d0a86a63959af
diff --git a/charts/cert-manager/templates/podmonitor.yaml b/charts/cert-manager/templates/podmonitor.yaml
index 83f7e1e..72d2dfe 100644
--- a/charts/cert-manager/templates/podmonitor.yaml
+++ b/charts/cert-manager/templates/podmonitor.yaml
@@ -27,7 +27,7 @@
     {{- end }}
 {{- end }}
 spec:
-  jobLabel: {{ template "cert-manager.fullname" . }}
+  jobLabel: app.kubernetes.io/name
   selector:
     matchExpressions:
       - key: app.kubernetes.io/name