build(deps): update helm release cert-manager to v1.20.3

Signed-off-by: mogenius-renovate-bot[bot] <260588915+mogenius-renovate-bot[bot]@users.noreply.github.com>

Author: mogenius-renovate-bot[bot]

cert-manager.yaml

@@ -2,7 +2,7 @@ apiVersion: mogenius.com/v1alpha1
 kind: PlatformDefault
 spec:
   # renovate: datasource=helm registryUrl=https://charts.jetstack.io chart=cert-manager
-  version: 1.20.0
+  version: v1.20.3
   valuesObject:
     installCRDs: true