Fixes to golang tutorial (#6321)

These fixes sync the examples with the code

Signed-off-by: Dharmit Shah <shahdharmit@gmail.com>

Author: dharmit

website/content/en/docs/building-operators/golang/tutorial.md

@@ -115,7 +115,7 @@ type MemcachedSpec struct {
 	// The following markers will use OpenAPI v3 schema to validate the value
 	// More info: https://book.kubebuilder.io/reference/markers/crd-validation.html
 	// +kubebuilder:validation:Minimum=1
-	// +kubebuilder:validation:Maximum=3
+	// +kubebuilder:validation:Maximum=5
 	// +kubebuilder:validation:ExclusiveMaximum=false
 
 	// Size defines the number of Memcached instances
@@ -406,6 +406,7 @@ metadata:
   name: memcached-sample
 spec:
   size: 3
+  containerPort: 11211
 ```
 
 Create the CR: