[Bleeding] Added support for amending help topic visibility permissions in help.yml. Addresses BUKKIT-1113

By: rmichela <deltahat@gmail.com>

paper-api/src/main/java/org/bukkit/help/IndexHelpTopic.java

@@ -41,6 +41,11 @@ public class IndexHelpTopic extends HelpTopic {
         return sender.hasPermission(permission);
     }
 
+    @Override
+    public void amendCanSee(String amendedPermission) {
+        permission = amendedPermission;
+    }
+
     public String getFullText(CommandSender sender) {
         StringBuilder sb = new StringBuilder();