docs(users): add woolworths,wooliesx (argoproj#6792)

Signed-off-by: Tianchu Zhao <[email protected]>

USERS.md

@@ -139,6 +139,8 @@ Currently, the following organizations are **officially** using Argo CD:
 1. [Webstores](https://www.webstores.nl)
 1. [Whitehat Berlin](https://whitehat.berlin) by Guido Maria Serra +Fenaroli
 1. [Witick](https://witick.io/)
+1. [WooliesX](https://wooliesx.com.au/)
+1. [Woolworths Group](https://www.woolworthsgroup.com.au/)
 1. [WSpot](https://www.wspot.com.br/)
 1. [Yieldlab](https://www.yieldlab.de/)
 1. [Zimpler](https://www.zimpler.com/)