Updated URLs everywhere. Maybe fix about-dialog

plug-ins/script-fu/scripts/pika-online.scm

@@ -18,7 +18,7 @@
 ; along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 (define (pika-online-docs-web-site)
-  (plug-in-web-browser "https://docs.pika.org/")
+  (plug-in-web-browser "https://heckin.technology/AlderconeStudio/PIKApp/wiki/")
 )
 
 (define (pika-help-main)