Change order of fields inside Response

To reflect change from graphql/graphql-js#838

Author: IvanGoncharov

spec/Section 7 -- Response.md

@@ -85,16 +85,16 @@ objects in the response as unordered Maps and arrive at a valid value.
 
 A response to a GraphQL operation must be a map.
 
-If the operation included execution, the response map must contain a first entry
-with key `data`. The value of this entry is described in the "Data" section. If
-the operation failed before execution, due to a syntax error, missing
-information, or validation error, this entry must not be present.
-
-If the operation encountered any errors, the response map must contain a next
+If the operation encountered any errors, the response map must contain a first
 entry with key `errors`. The value of this entry is described in the "Errors"
 section. If the operation completed without encountering any errors, this entry
 must not be present.
 
+If the operation included execution, the response map must contain a next entry
+with key `data`. The value of this entry is described in the "Data" section. If
+the operation failed before execution, due to a syntax error, missing
+information, or validation error, this entry must not be present.
+
 The response map may also contain an entry with key `extensions`. This entry,
 if set, must have a map as its value. This entry is reserved for implementors
 to extend the protocol however they see fit, and hence there are no additional