manifest: Update nRF hw models to latest

Update the HW models module to:
d5b95fdd0260e8189e788d40d2863d1e2d4be159

Including the following:
d5b95fd grtc hal replacement: Fix bug in nrf_grtc_int_group_enable/
        disable()
5f3641d GRTC: With a CC in the past evaluate immediately

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>