[R-sig-Debian] arm64 r-base backports on CRAN

[Jeroen Ooms]

Hello,

Would it be possible to add arm64 binaries for the r-base backports on
https://cran.r-project.org/bin/linux/debian and/or perhaps update the
readme a bit about what is available?

Afaict, the deb repos on CRAN currently host arm64 binaries for
ubuntu-22.04 / 24.04, however not for ubuntu-20.04 and also not for
Debian 10/11/12.

Having the installers there will make it easier for users on arm64
hardware (or GHA) to check their packages on Debian.

Thanks!