75a2484dba
This commit updates the unified installer instructions to avoid specifying a given version.
At the moment, we're technically unable to use variables in URLs, so we need to update
the page each release.
Fixes https://github.com/scylladb/scylladb/issues/20677
(cherry picked from commit 400a14eefa)
Closes scylladb/scylladb#20708