docs: add slickgrid-stellar note

Author: ghiscoding

README.md

@@ -11,7 +11,7 @@
 [![codecov](https://codecov.io/gh/slickgrid-stellar/Angular-Slickgrid/branch/master/graph/badge.svg)](https://codecov.io/gh/slickgrid-stellar/Angular-Slickgrid)
 
 ### Community
-Recently moved all my SlickGrid related repos into a new [Slickgrid-Stellar](https://github.com/slickgrid-stellar) GitHub org to regroup them all under a single location.
+Recently moved all my SlickGrid related repos into [Slickgrid-Stellar](https://github.com/slickgrid-stellar) org to regroup them all under a single location.
 
 ### Brief introduction
 One of the best javascript datagrid [SlickGrid](https://github.com/mleibman/SlickGrid) which was originally developed by @mleibman is now available to Angular. I have used a few datagrids and SlickGrid beats most of them in terms of functionalities and performance (it can easily deal with even a million row). We will be using the [6pac/SlickGrid](https://github.com/6pac/SlickGrid/) fork, it is the most active fork since the original author @mleibman stopped working on his original repo. Also worth knowing that I have contributed a lot to the 6pac/SlickGrid fork for the benefit of Angular-Slickgrid... also a reminder, this is a wrapper of a jQuery lib (SlickGrid) and a big portion of the lib (like Editors, Filters and others) are written in jQuery/JavaScript, so just keep that in mind and it also mean that jQuery is a dependency.