Fix CI

Author: gaearon

packages/events/EventPluginRegistry.js

@@ -233,7 +233,7 @@ export function injectEventPluginsByName(
       const names = Object.keys(injectedNamesToPlugins).join(', ');
       lowPriorityWarning(
         false,
-        `Injecting custom event plugins (${names}) is deprecated ` +
+        'Injecting custom event plugins (' + names + ') is deprecated ' +
           'and will not work in React 17+. Please update your code ' +
           'to not depend on React internals. The stack trace for this ' +
           'warning should reveal the library that is using them. ' +