Add changeset for error response

.changesets/fix_nc_prioritize_errors_in_response.md

@@ -0,0 +1,7 @@
+### Prioritize errors in GraphQL response ([Issue #4375](https://github.com/apollographql/router/issues/4375))
+
+Previously, the router would return data from an operation before any potential errors in the request.
+[As recommended in the GraphQL spec](https://spec.graphql.org/draft/#note-6f005), the suggested route
+is to try to return errors first before data in the response. The router now does so.
+
+By [@nicholascioli](https://github.com/nicholascioli) in https://github.com/apollographql/router/pull/4728