fix logo link

Author: corsicanec82

README.md

@@ -23,6 +23,6 @@ async.concat(coll, (item, callback) => {
 ```
 For more information, see the [Full Documentation](https://github.com/hexlet-components/js-async/tree/master/docs)
 
-[![Hexlet Ltd. logo](https://raw.githubusercontent.com/Hexlet/hexletguides.github.io/master/images/hexlet_logo128.png)](https://ru.hexlet.io/pages/about?utm_source=github&utm_medium=link&utm_campaign=js-async)
+[![Hexlet Ltd. logo](https://raw.githubusercontent.com/Hexlet/assets/master/images/hexlet_logo128.png)](https://ru.hexlet.io/pages/about?utm_source=github&utm_medium=link&utm_campaign=js-async)
 
 This repository is created and maintained by the team and the community of Hexlet, an educational project. [Read more about Hexlet (in Russian)](https://ru.hexlet.io/pages/about?utm_source=github&utm_medium=link&utm_campaign=js-async).