Update index-test.js

Author: bradzacher

__tests__/index-test.js

@@ -41,7 +41,7 @@ test('schemas', (t) => {
 
 test('plugin referentially equal to prevent flat config issues', (t) => {
   for (const config in Object.keys(plugin.flatConfigs)) {
-    t.equal(plugin, config.plugins['jsx-a11y'], `${config.name}'s plugin reference is referentially equal to the top-level export`);
+    t.equal(plugin, plugin.flatConfigs[config].plugins['jsx-a11y'], `${config.name}'s plugin reference is referentially equal to the top-level export`);
   }
   t.end();
 });