Switch iot_zezere_server back to 64bit not uefi

It boots the 'support' disk image, not the image created by
install_default_upload, and that disk image is only set up for
BIOS boot.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

templates.fif.json

@@ -2038,7 +2038,7 @@
         "iot_zezere_server": {
             "profiles": {
                 "fedora-IoT-dvd_ostree-iso-aarch64-*-aarch64": 20,
-                "fedora-IoT-dvd_ostree-iso-x86_64-*-uefi": 40
+                "fedora-IoT-dvd_ostree-iso-x86_64-*-64bit": 40
             },
             "settings": {
                 "BOOTFROM": "c",