Download URL:
https://deb.debian.org/debian/pool/main/s/shim-signed/shim-signed_1.50+16.1-2_amd64.deb
- shimx64.efi.signed --> bootx64.efi

https://deb.debian.org/debian/pool/main/s/shim-helpers-amd64-signed/shim-helpers-amd64-signed_1+16.1+2_amd64.deb
- mmx64.efi.signed --> mmx64.efi
