Update README.md

Author: alexeyzimarev

README.md

@@ -1,3 +1,7 @@
+# Deprecation notice
+
+Samples are moved to the [core repository](https://github.com/Eventuous/eventuous/tree/dev/samples).
+
 # Bookings sample application - Postgres
 
 This projects shows some of the features of Eventuous:
@@ -61,4 +65,4 @@ graph TB
     Projections --> BC[(BookingState)]
     Projections --> MB[(MyBookings)]
     end
-```
+```