Incorporate feedback changes

Author: leslitagordita

content/changelog/2019/04-29-api.md

@@ -15,5 +15,5 @@ version: 4.0.22
 - Deprecated data centers are no longer returned from the *regions* endpoint (GET /regions). 
    - Deprecated data centers include Tokyo1 ("id": "ap-northeast-1a", "country": "jp").
 - Viewing (GET /account) and updating your account (PUT /account) now returns a consistent value for the *credit_card* object's *expiry* property.
-- More explicit error messages are returned when creating a NodeBalancer (PUT /nodebalancers) and an invalid node IP address is provided.
+- More explicit error messages are returned when creating a NodeBalancer (POST /nodebalancers), creating a NodeBalancer node (POST /nodebalancers/{nodeBalancerId}/configs/{configId}/nodes), updating a NodeBalancer node (PUT /nodebalancers/{nodeBalancerId}/configs/{configId}/nodes/{nodeId}) and an invalid node IP address is provided.