Linked ICARUSTriggerDatabase.md in "Content of the packages" section (because)

Author: PetrilloAtWork

icaruscode_wiki/Wiki.md

@@ -47,6 +47,7 @@ Content of the packages
 -   [Detector geometry description files](Detector_geometry.md)
 -   [Physics simulation](physics/simulation.md)
 -   [Software parameters and settings](Software_parameters_and_settings.md)
+-   [Access to the trigger database](ICARUSTriggerDatabase.md)