Multiple destination instance update (#4856)

* Multiple destination instance update

* Apply suggestions from code review

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

Author: vanand17

src/connections/destinations/add-destination.md

@@ -114,6 +114,8 @@ Some destinations do not support having multiple instances connected to the same
 
 You can create unique destination filters for each destination instance connected to the same source.
 
+> info ""
+> Some destinations don't support multiple instances connected to the same source. If this is the case, you won't see the option to add a second instance of that destination.
 
 ### Connect multiple sources to one instance of a destination