Update CTIDE fake rate uncertainty recommendation for Rel22
This MR updates the CTIDE fake rate uncertainty to the newly derived value for preliminary Rel22 recommendations (just a single number).
More details can be found in the following slides from the Tracking CP plenary: https://indico.cern.ch/event/1175104/contributions/4953775/attachments/2477018/4251353/CTIDE_7July_KBehr.pdf