Switch to snp kernels for EQ Metal

roles/netbootxyz/templates/menu/boot.cfg.j2

@@ -115,7 +115,7 @@ goto clouds_end
 
 :metal_x86_64
 set cmdline console=ttyS1,115200n8
-iseq ${platform} efi && set ipxe_disk netboot.xyz-metal.efi || set ipxe_disk netboot.xyz-metal.kpxe
+iseq ${platform} efi && set ipxe_disk netboot.xyz-metal-snp.efi || set ipxe_disk netboot.xyz-metal.kpxe
 set menu_linux_i386 0
 set menu_freedos 0
 set menu_windows 0
@@ -123,7 +123,7 @@ goto clouds_end
 
 :metal_arm64
 set cmdline console=ttyAMA0,115200
-set ipxe_disk netboot.xyz-metal-arm64.efi
+set ipxe_disk netboot.xyz-metal-arm64-snp.efi
 set menu_bsd 0
 set menu_freedos 0
 set menu_live 0