Update Activity singleInstance example

[swayangjit]

Eg: Suppose there is an activity stack of A -> B -> C -> D. If we launch activity B again with the launch mode as “singleTask”.
should be updated to
Eg: Suppose there is an activity stack of A -> B -> C -> D. If we launch activity D again with the launch mode as “singleInstance”.

[14likhit]

The issue is still here. Any clarification/update on the same will help.