ci: Update TF-M version to be aligned with FIH library changes

So far the FIH CI job was fetching a WIP change from
TF-M Gerrit to align the MCUboot and TF-M from the FIH
library point of view. This change is replacing to fetch
the final version instead of the WIP change.

Signed-off-by: Tamas Ban <tamas.ban@arm.com>