chore: add Liatrio to the official users list (argoproj#11377)

Signed-off-by: Robert Kelly <RobertKelly@users.noreply.github.com>

Signed-off-by: Robert Kelly <RobertKelly@users.noreply.github.com>
Signed-off-by: emirot <emirot.nolan@gmail.com>

USERS.md

@@ -121,6 +121,7 @@ Currently, the following organizations are **officially** using Argo CD:
 1. [Kurly](https://www.kurly.com/)
 1. [LexisNexis](https://www.lexisnexis.com/)
 1. [Lian Chu Securities](https://lczq.com)
+1. [Liatrio](https://www.liatrio.com)
 1. [Lightricks](https://www.lightricks.com/)
 1. [LINE](https://linecorp.com/en/)
 1. [Lytt](https://www.lytt.co/)