feat: enable forky support in deb-get

Allow deb-get to run on Debian  14 (Forky) when it is released

Author: philclifford

deb-get

@@ -1373,6 +1373,7 @@ case "${UPSTREAM_CODENAME}" in
     bullseye) UPSTREAM_RELEASE="11";;
     bookworm) UPSTREAM_RELEASE="12";;
     trixie)   UPSTREAM_CODENAME="13";;
+    forky)    UPSTREAM_CODENAME="14";;
     sid)      UPSTREAM_RELEASE="unstable";;
     focal)    UPSTREAM_RELEASE="20.04";;
     jammy)    UPSTREAM_RELEASE="22.04";;