Update docs/how-to/cooperative_groups.rst

Co-authored-by: Leo Paoletti <[email protected]>

docs/how-to/cooperative_groups.rst

@@ -116,9 +116,7 @@ You can find the code difference to the original block model in the following ta
             // ...
           }
 
-The kernel launch also different at cooperative groups case, which depends on the 
-group type. For example, at grid groups with single GPU case the ``hipLaunchCooperativeKernel``
-has to be used.
+The kernel launch also differs with cooperative groups as it depends on the group type. For example, grid groups with a single-GPU, the ``hipLaunchCooperativeKernel`` has to be used.
 
 Group Types
 =============