fix(caching): Take operation into account for cache prefix (#1365) (#1366)

Author: dulnan

src/GraphQL/Execution/Executor.php

@@ -356,6 +356,7 @@ protected function cachePrefix() {
       'query' => DocumentSerializer::serializeDocument($this->document),
       'variables' => $variables,
       'extensions' => $extensions,
+      'operation' => $this->operation,
     ]));
 
     return $hash;