Add README note to trigger PR workflow

Author: donutt2u

README.md

@@ -87,3 +87,4 @@ However, we would absolutely love to have people testing MCW and provide feedbac
 © Google, 2015. Licensed under an
 [Apache-2](https://github.com/google/material-design-lite/blob/master/LICENSE)
 license.
+# PoC Update