fix mitigations's wrong file name. (#41)

Author: blueveryday

SCRIPTS/02_prepare_package.sh

@@ -74,7 +74,7 @@ sed -i '/REQUIRE_IMAGE_METADATA/d' target/linux/rockchip/armv8/base-files/lib/up
 wget -qO - https://github.com/openwrt/openwrt/commit/c21a3570.patch | patch -p1
 sed -i '/I915/d' target/linux/x86/64/config-5.15
 # Disable mitigations
-sed -i 's,rootwait,rootwait mitigations=off,g' target/linux/rockchip/image/mmc.bootscript
+sed -i 's,rootwait,rootwait mitigations=off,g' target/linux/rockchip/image/default.bootscript
 sed -i 's,noinitrd,noinitrd mitigations=off,g' target/linux/x86/image/grub-efi.cfg
 sed -i 's,noinitrd,noinitrd mitigations=off,g' target/linux/x86/image/grub-iso.cfg
 sed -i 's,noinitrd,noinitrd mitigations=off,g' target/linux/x86/image/grub-pc.cfg