Update docs/how-to/hip_runtime_api/cooperative_groups.rst

Co-authored-by: MKKnorr <[email protected]>

docs/how-to/hip_runtime_api/cooperative_groups.rst

@@ -28,7 +28,7 @@ elements:
 Cooperative groups thread model
 ================================================================================
 
-The thread hierarchy abstraction of cooperative groups are in :ref:`grid hierarchy <coop_thread_top_hierarchy>` and :ref:`block hierarchy <coop_thread_bottom_hierarchy>`.
+The thread hierarchy abstractions of cooperative groups are depicted in the following figures: :ref:`grid hierarchy <coop_thread_top_hierarchy>` and :ref:`block hierarchy <coop_thread_bottom_hierarchy>`.
 
 .. _coop_thread_top_hierarchy: