Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: srmungar

config/osv/edge-microvisor-toolkit/emt3/imageconfigs/defaultconfigs/default-raw-aarch64.yml

@@ -29,7 +29,7 @@ disk:
       mountOptions: umask=0077
 
     - id: rootfs
-      type: linux-root-amd64
+      type: linux-root-arm64
       start: 513MiB
       end: 2561MiB
       fsType: ext4