Bug 40451: Link patron restriction types to correct section in manual

The mapping connecting the patron restriction types administration page
to the corresponding page in the manual was incorrect. This patch fixes
it so that clicking the help link from that page will take the user
directly to the correct place on the page.

To test, apply the patch and restart services.

- Go to Administration -> Patron restriction types.
- Click the "Help" link.
- You should be taken directly to the Patron restriction types page in
  the manual: administration.html#patron-restriction-types

Sponsored-by: Athens County Public Libraries
Signed-off-by: Roman Dolny <roman.dolny@jezuici.pl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 467fad871a)
Signed-off-by: Paul Derscheid <paul.derscheid@lmscloud.de>

Koha/Manual.pm

@@ -125,7 +125,7 @@ our $mapping = {
     'admin/preferences#web_services'           => '/webservicespreferences.html',
     'admin/smart-rules'                        => '/administration.html#circulation-and-fine-rules',
     'admin/smtp_servers'                       => '/administration.html#smtp-servers',
-    'admin/restrictions'                       => '/administration.html#patron-restrictions',
+    'admin/restrictions'                       => '/administration.html#patron-restriction-types',
     'admin/share_content'                      => '/administration.html#share-content-with-mana-kb',
     'admin/sms_providers'                      => '/administration.html#sms-cellular-providers',
     'admin/systempreferences'                  => '/localusepreferences.html',