Bug 36635: Fix vendor's issue show view

Should be "show" not "cud-show"

Test plan:
Create an issue for a vendor, click on the issue's id on the issue list
table
Notice that with the patch applied the issue is displayed. Without the
patch the "show" view is empty

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>

acqui/vendor_issues.pl

@@ -53,7 +53,7 @@ unless ($vendor) {
     exit;
 }
 
-if ( $op eq 'add_form' || $op eq 'cud-show' ) {
+if ( $op eq 'add_form' || $op eq 'show' ) {
     $template->param( issue => $issue );
 } elsif ( $op eq 'cud-add_validate' ) {
     my $type       = $input->param('type');