manifest: Add PSA ed25519 image encryption/verification to MCUboot

Update MCUboot version to birng in PSA encryption support.
Update Zephyr to bring in nrf54l15 default Kconfig changes.

Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>

west.yml

@@ -72,7 +72,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: 96aa87c2aae419a2d04f4ee86ef12b359789a817
+      revision: pull/2028/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above
@@ -140,7 +140,7 @@ manifest:
           compare-by-default: true
     - name: mcuboot
       repo-path: sdk-mcuboot
-      revision: e66169aa8daf93eee0ff3729ecc2c343c7fade51
+      revision: pull/323/head
       path: bootloader/mcuboot
     - name: qcbor
       url: https://github.com/laurencelundblade/QCBOR