curl.1: typo in -v description

Reported by: Ian D Allen
Bug: https://bugs.launchpad.net/ubuntu/+source/curl/+bug/714895

Forwarded to us by:

Reported by: Andreas Olsson
Bug: http://curl.haxx.se/bug/view.cgi?id=3175422

docs/curl.1

@@ -1357,7 +1357,7 @@ If you think this option still doesn't give you enough details, consider using
 
 This option overrides previous uses of \fI--trace-ascii\fP or \fI--trace\fP.
 
-Use \fI-S/--silent\fP to make curl quiet.
+Use \fI-s/--silent\fP to make curl quiet.
 .IP "-V/--version"
 Displays information about curl and the libcurl version it uses.