fix: use appendChild for inline script injection in CustomScriptsInjector

Replace textContent assignment with appendChild(createTextNode()) to ensure
inline scripts execute properly in all browsers, including Snapchat iOS webview.

Fixes FORMBRICKS-QH

apps/web/modules/survey/link/components/custom-scripts-injector.tsx

@@ -58,7 +58,7 @@ export const CustomScriptsInjector = ({
 
         // Copy inline script content
         if (script.textContent) {
-          newScript.textContent = script.textContent;
+          newScript.appendChild(document.createTextNode(script.textContent));
         }
 
         document.head.appendChild(newScript);