Add hiring announcement for remote engineers

Added a hiring announcement for remote engineers to the README.

Author: paulirwin

README.md

@@ -5,6 +5,11 @@
 A split button component for Angular Material.
 Split buttons (also known as "split button dropdowns" in Bootstrap) have a primary action button with a conjoined dropdown toggle that opens a menu for secondary actions.
 
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+
+**What if your day job was contributing to open-source projects and custom AI solutions &mdash; and you got paid for it?**<br />
+We're hiring remote engineers to contribute to cutting-edge AI and custom software projects. 100% remote, 100% real impact. https://www.feature23.com/careers
+
 ## Getting Started
 
 See the [README](projects/ngx-mat-split-button/README.md) in the ngx-mat-split-button project to get started.