simpleran: update xlte to latest version

Needed for password authentication to websocket
A bug was discovered in previous version

software/simpleran/software.cfg

@@ -197,7 +197,7 @@ scripts =
 [xlte-repository]
 recipe = slapos.recipe.build:gitclone
 repository = https://lab.nexedi.com/kirr/xlte.git
-revision = c5e92b6a
+revision = 598588a3
 git-executable = ${git:location}/bin/git
 
 [xlte]