Update request.go

Co-authored-by: Chris Trombley <[email protected]>

request.go

@@ -493,7 +493,7 @@ func unmarshalNode(data *Node, model reflect.Value, included *map[string]*Node)
 					// this indicates disassociating the relationship
 					isExplicitNull = true
 				} else if relationshipDecodeErr != nil {
-					er = fmt.Errorf("decode err %v\n", relationshipDecodeErr)
+					er = fmt.Errorf("Could not unmarshal json: %w", relationshipDecodeErr)
 				}
 
 				// This will hold either the value of the choice type model or the actual