Updated URLs everywhere. Maybe fix about-dialog

plug-ins/help/pikahelpdomain.c

@@ -196,7 +196,7 @@ pika_help_domain_map (PikaHelpDomain    *domain,
                               */
                              _("Please install the additional help package "
                                "or use the online user manual at: "
-                               "https://docs.pika.org/"));
+                               "https://heckin.technology/AlderconeStudio/PIKApp/wiki/"));
                 }
               break;