Add extra comment into feature rollback

Signed-off-by: Ricardo Pchevuzinske Katz <ricardo.katz@gmail.com>

Author: rikatz

keps/sig-network/2079-network-policy-port-range/README.md

@@ -232,9 +232,13 @@ _This section must be completed when targeting alpha to a release._
 
 * **Can the feature be disabled once it has been enabled (i.e. can we roll back
   the enablement)?**
-  Yes, fields created before feature gate being disabled will not be dropped unless the user removes it from the object.
-  If the user removes the field from the object it will be dropped and the 
-  field can only be re-inserted if feature gate is enabled again.
+  
+  Yes. One caveat here is that NetworkPolicies created with EndPort field set 
+  when the feature was enabled will continue to have that field set when the 
+  feature is disabled unless user removes it from the object. 
+  
+  If the value is dropped with the FeatureGate disabled, the field can only 
+  be re-inserted if feature gate is enabled again.
 
   Rolling back the Kubernetes API Server that does not have this field
   will make the field not be returned anymore on GET operations,