[nrf fromtree] west.yml: MCUboot synchronization from upstream

Update Zephyr fork of MCUboot to revision:
  b192716c969ad358bb3a1db60c898212f3275c55

Brings following Zephyr relevant fixes:

  - b192716c Revert "loader: Allow to specify slot number in
    version"
  - 5b7bccf9 boot: bootutil: swap_offset: Fix not including
    unprotected TLVs
  - ee9efe01 bootutil: Replace boot_write_enc_key with
    boot_write_enc_keys
  - 80a39c64 bootutil: Replace literal slot indexes with
    identifiers

Signed-off-by: Jamie McCrae <[email protected]>
(cherry picked from commit fbdc8b2)

Author: nordicjm

west.yml

@@ -316,7 +316,7 @@ manifest:
       groups:
         - crypto
     - name: mcuboot
-      revision: 48b0f6da9af8d009eb8eafba023998a7d85320a1
+      revision: b192716c969ad358bb3a1db60c898212f3275c55
       path: bootloader/mcuboot
       groups:
         - bootloader