Ubuntu 20.04 release depends on wrong `libc6` version.

I tried installing the `git-interactive-rebase-tool-2.4.1-ubuntu-20.04_amd64.deb` release package, which fails with ``` The following packages have unmet dependencies: git-interactive-rebase-tool : Depends: libc6 (>= 2.34) but 2.31-0ubuntu9.16 is to be installed ``` The latest `libc6` on Ubuntu 20.04 is 2.31: https://launchpad.net/ubuntu/focal/+package/libc6