show tsx snippets in the docs by default

Author: slax57

docs/js/ra-doc-exec.js

@@ -3,7 +3,7 @@ var allMenus, navLinks, versionsLinks;
 
 const applyPreferredLanguage = async () => {
     const preferredLanguage =
-        window.localStorage.getItem('preferred-language') || 'jsx';
+        window.localStorage.getItem('preferred-language') || 'tsx';
 
     const languageSwitchers = document.querySelectorAll('.language-switcher');
     const codeFences = document.querySelectorAll('div[class^=language-]');