cert-manager: update Helm release cert-manager to v1.16.2

Author: renovate[bot]

cert-manager/kustomization.yaml

@@ -6,7 +6,7 @@ resources:
 helmCharts:
 - name: cert-manager
   repo: https://charts.jetstack.io
-  version: v1.16.1
+  version: v1.16.2
   releaseName: cert-manager
   namespace: cert-manager
   valuesFile: values.yaml