manifest: Update sdk-mcuboot revision (auto-manifest PR)

Automatically created by action-manifest-pr GH action from PR:
nrfconnect/sdk-mcuboot#576

Signed-off-by: Nordic Builder <[email protected]>

Author: NordicBuilder

west.yml

@@ -126,7 +126,7 @@ manifest:
           compare-by-default: true
     - name: mcuboot
       repo-path: sdk-mcuboot
-      revision: 19c0a68d87a92cca89321d48b03573a20addcc1f
+      revision: 66d5c91c080c0817b24c2e9586d26b57f8c9baf6
       path: bootloader/mcuboot
     - name: qcbor
       url: https://github.com/laurencelundblade/QCBOR