[Fix serverlessworkflow#712] Ricardo's comment

Signed-off-by: Francisco Javier Tirado Sarti <ftirados@redhat.com>
Signed-off-by: Charles d'Avernas <charles.davernas@neuroglia.io>

specification.md

@@ -581,6 +581,27 @@ into. With this, after our action executes the state data would be:
 }
 ```
 
+To illustrate merge of not json both object, let`s assume that, in previous example, the action definition is at follows
+
+```json
+"actions":[
+ {
+ "name": "fetch_only_pasta",
+ "functionRef": "breadAndPastaTypesFunction",
+ "actionDataFilter": {
+ "results": "${ .pasta[1] ]",
+ }
+ }
+ ]
+}
+```
+Since there is not `toStateData` and the result is not a json object but an string, the state would be
+
+```json
+{
+ "response": "spaghetti"
+}
+```
 In the case action results should not be added/merged to state data, we can set the `useResults` property to `false`.
 In this case, the `results` and `toStateData` properties should be ignored, and nothing is added/merged to state data.
 If `useResults` is not specified (or it's value set to `true`), action results, if available, should be added/merged to state data.