manifest: pull mcuboot change for mimxrt1050/1060 renames

Make sure CI can properly run on bootloader module by pulling
the mcuboot version that has correct names for the mimxrt1050/60
platforms.

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

west.yml

@@ -300,7 +300,7 @@ manifest:
       groups:
         - crypto
     - name: mcuboot
-      revision: f5454f16358225f69ff729301c8e56d8a580f81a
+      revision: a2bc982b3379d51fefda3e17a6a067342dce1a8b
       path: bootloader/mcuboot
       groups:
         - bootloader