add favicon to code app

util-sqlpage/code.sql

@@ -11,6 +11,6 @@ SET ":link" = '/code.sql';
 SET ":color" = '#f59f00';
 SET ":tabler_color" = 'azure';
 SET ":image" = '/static/code/qr.svg';
---SET ":favicon" = :image;
+SET ":favicon" = :image;
 --SET ":manifest" = '/static/upload/manifest.json';
 SELECT 'dynamic' AS component, sqlpage.run_sql('code/Index.sql') AS properties;