Update catalog-templates.md - Remove deprecated image from examples

The kube-rbac-proxy from upstream is deprecated. Therefore, its better do not have it in the examples since we do not promoted its usage

Author: camilamacedo86

content/en/docs/Reference/catalog-templates.md

@@ -94,8 +94,6 @@ properties:
     packageName: example-operator
     version: 0.1.0
 relatedImages:
-- image: gcr.io/kubebuilder/kube-rbac-proxy:v0.8.0
-  name: ""
 - image: docker.io/example/example-operator-bundle:0.1.0
   name: ""
 - image: docker.io/example/example-operator:0.1.0