west.yml: MCUboot synchronization from upstream

Update Zephyr fork of MCUboot to revision:
  05d11942774fc15b90af101232ec5305051216ec

Brings following Zephyr relevant fixes:
 - 215345f7 zephyr: Add firmware loader MCUboot operation style
 - 433b8480 zephyr: Move IO functions out of main to separate
   file
 - 5e6cffbf boot: boot_serial: Fix single slot encrypted image
   list
 - 3f0b89d6 boot: zephyr: add support for mimxrt101x_evk

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>