check mbsync, not mailsync

bin/mailsync

@@ -4,7 +4,7 @@
 # Run only if user logged in (prevent cron errors)
 pgrep -u "$USER" >/dev/null || exit
 # Run only if not already running in other instance
-pgrep -x mailsync >/dev/null && exit
+pgrep -x mbsync >/dev/null && exit
 
 # Checks for internet connection and set notification script.
 ping -q -c 1 1.1.1.1 > /dev/null || exit