Update for state data comment

Signed-off-by: Tihomir Surdilovic <[email protected]>

Author: Tihomir Surdilovic

specification.md

@@ -269,7 +269,9 @@ It filters the state's data output to be passed as data input to the transitioni
 If the current state is the workflow end state, the filtered state's data output becomes the workflow data output.
 If `output` is not defined or does not select any parts of the state's data output, its data output is not filtered.
 
-The results of the `input` and `output` expressions should be merged into the state data. 
+Results of the `input` expression should become the state data. 
+Results of the `output` expression should become the state data output.
+
 For more information on this you can reference the [data merging](#Data-Merging) section.
 
 Let's take a look at some examples of state filters. For our examples let's say the data input to our state is as follows: