B2B-2259: customAttributeMetadata GraphQl query has no cache identity

- CR fix

Author: rganin

dev/tests/api-functional/testsuite/Magento/GraphQl/Eav/CustomAttributesMetadataCacheTest.php

@@ -269,7 +269,7 @@ private function assertQueryResultIsCacheMissWithError(string $query, string $ex
             $expectedError,
             $caughtException->getMessage()
         );
-        // assert that it's a miss after deletion
+        // assert that it's a miss
         $this->assertEquals(
             $caughtException->getResponseHeaders()['X-Magento-Cache-Debug'],
             'MISS'