Debian versions

[Paul Scott <waterhorsemusic@aol.com>]

Hello,

I have run sid/unstable for about 20 years. The only active line in my 
/etc/apt/sources.list is

deb http://ftp.us.debian.org/debian/ sid main non-free-firmware

cat /etc/os-release gives"

PRETTY_NAME="Debian GNU/Linux 13 (trixie)"
NAME="Debian GNU/Linux"
VERSION_ID="13"
VERSION="13 (trixie)"
VERSION_CODENAME=trixie
DEBIAN_VERSION_FULL=13.0
ID=debian
HOME_URL="https://www.debian.org/";
SUPPORT_URL="https://www.debian.org/support";
BUG_REPORT_URL="https://bugs.debian.org/";

Shouldn't it show sid or unstable or forky?

TIA for any help understanding this,

Paul