BUG #17405: Minor upgrade from 12.9 to 12.10 works fine, but PSQL version shows "12.9"

The following bug has been logged on the website:

Bug reference: 17405
Logged by: Julian Garcia
Email address: julian(dot)garcia(at)inrop(dot)es
PostgreSQL version: 12.10
Operating system: Red Hat Enterprise Linux Server release 6.10 (Sant
Description:

Hi!

I've upgraded my Postgres version from 12.9 to 12.10 following the
documentation steps:

service postgresql-12 stop
yum update postgresql12-server
service postgresql-12 start

And the binaries do in fact show the upgraded version, the DB starts good,
everything went well:

postgres(at)dgojmysql01pre ~ $ rpm -qa | grep postgres
postgresql12-libs-12.10-1PGDG.rhel6.x86_64
postgresql12-server-12.10-1PGDG.rhel6.x86_64
postgresql12-12.10-1PGDG.rhel6.x86_64

But, when using the psql it would still show the 12.9 version:

root(at)myserver ~ # sudo su - postgres
postgres(at)myserver ~ $ psql
psql (12.9)
Type "help" for help.

postgres=#

Is it possible that this is a bug and even though the upgrade was flawless
it wouldn't reflect on the login message for psql? Thank you!!