scripts/documentation-file-ref-check: fix help message

The name of the --fix option was renamed, but it was not
changed at the quick help message.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/scripts/documentation-file-ref-check b/scripts/documentation-file-ref-check
index 2520bc1..9e7ae14 100755
--- a/scripts/documentation-file-ref-check
+++ b/scripts/documentation-file-ref-check
@@ -21,7 +21,7 @@
 );
 
 if ($help != 0) {
-    print "$scriptname [--help] [--fix-rst]\n";
+    print "$scriptname [--help] [--fix]\n";
     exit -1;
 }