Enable EFI memtest as upstream iPXE bug fixed

https://github.com/ipxe/ipxe/issues/456

roles/netbootxyz/defaults/main.yml

@@ -631,7 +631,7 @@ site_name: netboot.xyz
 time_server: 0.pool.ntp.org
 utilitiesarm:
   memtest86:
-    enabled: false
+    enabled: true
     kernel: ${live_endpoint}{{ endpoints.memtest86.path }}memtest86-usb.img
     name: Memtest86 Free - {{ endpoints.memtest86.version }}
     type: sanboot
@@ -673,7 +673,7 @@ utilitiesefi:
     name: Kaspersky Rescue Disk
     type: ipxemenu
   memtest86:
-    enabled: false
+    enabled: true
     kernel: ${live_endpoint}{{ endpoints.memtest86.path }}memtest86-usb.img
     name: Memtest86 Free - {{ endpoints.memtest86.version }}
     type: sanboot