sudo apt-get install --reinstall grub-efi-amd64{,-bin,-signed}
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 3 reinstalled, 0 to remove and 0 not upgraded.
Need to get 0 B/1,001 kB of archives.
After this operation, 0 B of additional disk space will be used.
Preconfiguring packages ...
(Reading database ... 231273 files and directories currently installed.)
Preparing to unpack .../grub-efi-amd64-signed_1.93.14+2.02-2ubuntu8.13_amd64.deb ...
Unpacking grub-efi-amd64-signed (1.93.14+2.02-2ubuntu8.13) over (1.93.14+2.02-2ubuntu8.13) ...
Preparing to unpack .../grub-efi-amd64_2.02-2ubuntu8.13_amd64.deb ...
Unpacking grub-efi-amd64 (2.02-2ubuntu8.13) over (2.02-2ubuntu8.13) ...
Preparing to unpack .../grub-efi-amd64-bin_2.02-2ubuntu8.13_amd64.deb ...
Unpacking grub-efi-amd64-bin (2.02-2ubuntu8.13) over (2.02-2ubuntu8.13) ...
Setting up grub-efi-amd64-bin (2.02-2ubuntu8.13) ...
Setting up grub-efi-amd64 (2.02-2ubuntu8.13) ...

Creating config file /etc/default/grub with new version
Setting up grub-efi-amd64-signed (1.93.14+2.02-2ubuntu8.13) ...