fixed sloppy language

Former-commit-id: b24d7756

roles/set_semaphore_count/README.md

 Some programs, i.e. GAMESS, needs a larger number of system semaphores than  provided by default.
-This role creates a systemd file that sets the value on startup, so that it is persistent after reboot
+This role creates a systemctl  file that sets the value on startup, so that it is persistent after reboot
 
 Shell command to set count: This is the default value for the role
 echo 500 256000 64 10240 > /proc/sys/kernel/sem