Test fix - GraphExploreResponseTests should not randomise array elements

Closes #33086

Author: markharwood

x-pack/protocol/src/test/java/org/elasticsearch/protocol/xpack/graph/GraphExploreResponseTests.java

@@ -87,6 +87,11 @@ protected  GraphExploreResponse doParseInstance(XContentParser parser) throws IO
     protected boolean supportsUnknownFields() {
         return true;
     }
+    
+    @Override
+    protected String[] getShuffleFieldsExceptions() {
+        return new String[]{"vertices"};
+    }    
 
     protected Predicate<String> getRandomFieldsExcludeFilterWhenResultHasErrors() {
         return field -> field.startsWith("responses");