add litleo to os macro

Author: stdweird

mkdocs/extra/gent.yml

@@ -69,7 +69,7 @@ othercluster: donphan
 hpcinfo: [email protected]
 hpcusersml: [email protected]
 hpcannounceml: [email protected]
-operatingsystem: RHEL 9.4 (doduo, donphan, gallade, shinx, joltik, accelgor)
+operatingsystem: RHEL 9.4 (doduo, donphan, gallade, shinx, joltik, accelgor, litleo)
 operatingsystembase: Red Hat Enterprise Linux
 # Special for perfexpert tutorial
 mpirun: vsc-mympirun