manifest: Bring SHA512 fix for MCUboot serial recovery.

Fix for non-working serial recovery with MCUboot configured
for SHA512.

Signed-off-by: Dominik Ermel <[email protected]>

Author: de-nordic

west.yml

@@ -129,7 +129,7 @@ manifest:
           compare-by-default: true
     - name: mcuboot
       repo-path: sdk-mcuboot
-      revision: v2.1.0-ncs2-rc2
+      revision: 4594a8693738004af89929cad12d33cdc82fbe6c
       path: bootloader/mcuboot
     - name: qcbor
       url: https://github.com/laurencelundblade/QCBOR