README.md - refer to KDAB social media links

Change-Id: If98b1f5b8226ed8e158a798eef2d06362da12be4
Reviewed-on: https://codereview.kdab.com/c/kdab/KDToolBox/+/98212
Tested-by: Continuous Integration <[email protected]>
Reviewed-by: Allen Winter <[email protected]>

Author: Allen Winter

README.md

@@ -104,3 +104,9 @@ to the Qt Project. We can give advanced or standard trainings anywhere
 around the globe on Qt as well as C++, OpenGL, 3D and more.
 
 Please visit https://www.kdab.com to meet the people who write code like this.
+
+Stay up-to-date with KDAB product announcements:
+
+* [KDAB Newsletter](https://news.kdab.com)
+* [KDAB Blogs](https://www.kdab.com/category/blogs)
+* [KDAB on Twitter](https://twitter.com/KDABQt)