Update README.md

Author: ajeetraina

workshop/dockerdesktop/README.md

@@ -9,7 +9,7 @@
 
 - [Docker Desktop for Mac](https://github.com/collabnix/dockerlabs/blob/master/workshop/dockerdesktop/mac/install/README.md)
    - [Overview](https://github.com/collabnix/dockerlabs/blob/master/workshop/dockerdesktop/mac/overview/README.md)
-   - [Internals](https://github.com/collabnix/dockerlabs/blob/master/workshop/dockerdesktop/mac/overview/README.md)
+   - [Architecture](https://github.com/collabnix/dockerlabs/blob/master/workshop/dockerdesktop/mac/architecture/README.md)
 - [Docker Desktop for Linux](https://github.com/collabnix/dockerlabs/blob/master/workshop/dockerdesktop/linux/README.md) 
 - [Docker Desktop for Windows](https://github.com/collabnix/dockerlabs/blob/master/workshop/dockerdesktop/windows/README.md)