coreboot/x301: set release=n (will re-test)

was reported broken on canoeboot 0.1, which uses 2021
coreboot. we use much newer coreboot now in libreboot, but
still, better be cautious. set to release=n.

i'll set status and remove release=n if it works on testing

Signed-off-by: Leah Rowe <leah@libreboot.org>

config/coreboot/x301_16mb/target.cfg

@@ -6,3 +6,4 @@ payload_seabios="y"
 payload_memtest="y"
 grub_scan_disk="ahci"
 status="untested"
+release="n"

config/coreboot/x301_4mb/target.cfg

@@ -6,3 +6,4 @@ payload_seabios="y"
 payload_memtest="y"
 grub_scan_disk="ahci"
 status="untested"
+release="n"

config/coreboot/x301_8mb/target.cfg

@@ -6,3 +6,4 @@ payload_seabios="y"
 payload_memtest="y"
 grub_scan_disk="ahci"
 status="untested"
+release="n"