try to fix css with webroot

Author: Absolucy

tgui/public/tgui.html

@@ -340,6 +340,7 @@
           var node = document.createElement('link');
           node.type = 'text/css';
           node.rel = 'stylesheet';
+          node.crossOrigin = 'anonymous';
           node.href = url;
           // Temporarily set media to something inapplicable
           // to ensure it'll fetch without blocking render