Correct reference to section name.

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doc/apps/x509.pod

@@ -103,7 +103,7 @@ this option has no effect: SHA1 is always used with DSA keys.
 =head1 DISPLAY OPTIONS
 
 Note: the B<-alias> and B<-purpose> options are also display options
-but are described in the B<TRUST OPTIONS> section.
+but are described in the B<TRUST SETTINGS> section.
 
 =over 4