hirsute
will be EOL in about 1.5 months, at which point the package servers may be shut down. Avoid this by hopping to the next LTS release 22.04 (Jammy Jellyfish).
While the release is currently in development, it seems unlikely that anything will break for us. I am doing the hirsute->jammy hop to avoid a hirsute->impish->jammy hop, but if anything does break, we can fall back to that “double hop”.