Swap order on response description fallbacks

Author: Nelspike

lib/spec/openapi/utils.js

@@ -341,9 +341,9 @@ function resolveResponse (fastifyResponseJson, produces, ref) {
     const referenceJsonSchema = findReference(definitions, rawJsonSchema.$ref)
 
     const response = {
-      description: referenceJsonSchema.description ||
-        resolved[xResponseDescription] ||
+      description: resolved[xResponseDescription] ||
         rawJsonSchema.description ||
+        referenceJsonSchema.description ||
         'Default Response'
     }