Updated URLs everywhere. Maybe fix about-dialog

app/pdb/image-cmds.c

@@ -5101,7 +5101,7 @@ register_image_procs (PikaPDB *pdb)
                                "pika-image-get-imported-file");
   pika_procedure_set_static_help (procedure,
                                   "Returns the imported file for the specified image.",
-                                  "This procedure returns the file associated with the specified image if the image was imported from a non-native Pika format. If the image was not imported, or has since been saved in the native Gimp format, this procedure returns %NULL.",
+                                  "This procedure returns the file associated with the specified image if the image was imported from a non-native Pika format. If the image was not imported, or has since been saved in the native Pika format, this procedure returns %NULL.",
                                   NULL);
   pika_procedure_set_static_attribution (procedure,
                                          "Eric Grivel <pika@lumenssolutions.com>",