update technical debt

docs/src/11_technical_risks.adoc

@@ -43,4 +43,5 @@ To assess the relevance level of the following risks, we will use number 1 to in
 | Filtering questions and answers | Given the structure of Wikidata there are sometimes where questions and answers do not have the proper label we are looking for. Although we have stablished filters and different strategies, sometimes it fails.
 | Changes in database model | Changing the model of a relational database makes it necessary to create a new database, losing all of the data we had before.
 | Game duplication code | Due to our little knowledge about JavaScript, we have not found a way of optimizing code from different game modes. It would be necessary to search for another way of doing it, as this is not maintenable.
+| Non-expiring session token | Once someone has logged in in the application, session token does not expire. That way session does not finish unless you explicitly log out.
 |===