päivittäessään
The Finnish word "päivittäessään" is the inessive case of the possessive form of the third infinitive of the verb "päivittää." This means it translates roughly to "while updating it" or "in the process of updating it." The verb "päivittää" itself means "to update" or "to refresh." The suffix "-essään" indicates that the action of updating is being performed by the subject of the main clause, and it refers back to that subject. The "-än" at the end signifies the inessive case, meaning "in" or "inside" the state or action of updating.
Therefore, "päivittäessään" is used in sentences where the subject is actively engaged in the act of updating