fix missed \ before -

doc/man/man1/scontrol.1

@@ -482,7 +482,7 @@ NOTE: The "show" command, when used with the "job" or "job <jobid>"
 entity displays detailed information about a job or jobs.  Much of
 this information may be modified using the "update job" command as
 described above.  However, the following fields displayed by the show
-job command are read-only and cannot be modified:
+job command are read\-only and cannot be modified:
 
 .TP
 \fIAllocNode:Sid\fp