west.yaml: MCUboot synchronization from upstream cherry-picks

Cherry-pick some MCUboot updates to Zephyr 3.4-branch.

Brings following Zephyr relevant fixes:

 - 865f1d0 boot_serial: fix image number handle in image upload
           request
 - fb2ff1d boot_serial: fix misuse of 'matched' param from
           zcbor_map_decode_bulk()
 - 7c2cfe6 boot_serial: Fix showing images that are not valid

Signed-off-by: Jamie McCrae <[email protected]>

Author: nordicjm

west.yml

@@ -268,7 +268,7 @@ manifest:
       groups:
         - crypto
     - name: mcuboot
-      revision: 74c4d1c52fd51d07904b27a7aa9b2303e896a4e3
+      revision: 865f1d07a297c6150fdc8e0a5bc2522d148648cd
       path: bootloader/mcuboot
     - name: mipi-sys-t
       path: modules/debug/mipi-sys-t