fix(flag): use jdecked twemoji fork

this was missed in #3086.

Author: mvorisek

src/themes/default/elements/flag.variables

@@ -5,7 +5,7 @@
 /* --------------
     Path
 --------------- */
-@flagPath: "https://cdn.jsdelivr.net/gh/twitter/twemoji@latest/assets/svg/";
+@flagPath: "https://cdn.jsdelivr.net/gh/jdecked/twemoji@latest/assets/svg/";
 @flagFileType: "svg";
 
 /* -------------------