Hi Jack!
Welcome to our forum. 
If the goal is to jut get the version info of the installed Suricata, type suricata -V, the results would tell you.
check-versions command is to check if the version you are using is really up to date.
Another way is to verify it yourself by checking the latest Suricata versions, on the website (Download | Suricata) or on our github (Releases 路 OISF/suricata 路 GitHub)
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