Update README: Remove SampleAssetManager reference (Fixes #121)

Signed-off-by: Umman Mammadov <137191653+UMMAN2005@users.noreply.github.com>

Author: UMMAN2005

README.md

@@ -7,10 +7,7 @@ It serves to provide a minimum level of functionality to allow simple,
 repeatable demonstrations and end-to-end tests to be realized with as
 little supporting infrastructure as possible.
 
-It is not intended to be any kind of comprehensive example of the
-breadth of functionality exposed though the OpenAssetIO API.
-See the SampleAssetManager for a more concrete example of canonical
-manager behavior.
+It is not intended to be any kind of comprehensive example of the breadth of functionality exposed through the OpenAssetIO API. For a more detailed reference implementation, see [OpenAssetIO-MediaCreation](https://github.com/OpenAssetIO/OpenAssetIO-MediaCreation) or consult the [official documentation](https://openassetio.github.io/).
 
 > Note: This code is a sketch to facilitate testing and sample
 > workflows. It should never be considered in any way a "good example