chore: update controller gen tools

Signed-off-by: Jonathan Gonzalez V. <jonathan.gonzalez@enterprisedb.com>

Author: sxd

config/crd/bases/barmancloud.cnpg.io_objectstores.yaml

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    controller-gen.kubebuilder.io/version: v0.19.0
+    controller-gen.kubebuilder.io/version: v0.20.1
   name: objectstores.barmancloud.cnpg.io
 spec:
   group: barmancloud.cnpg.io