Fix typo in main.h (#10858)

descripton -> description

daemon/main.h

@@ -19,7 +19,7 @@ struct option_def {
     const char val;
     /** The name of the long option. */
     const char *description;
-    /** Short descripton what the option does */
+    /** Short description what the option does */
     /** Name of the argument displayed in SYNOPSIS */
     const char *arg_name;
     /** Default value if not set */