tools: set normalizeTD text default to empty string

PR-URL: #51543
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Yagiz Nizipli <[email protected]>

Author: marco-ippolito

tools/dep_updaters/update-root-certs.mjs

@@ -28,7 +28,7 @@ const getCertdataURL = (version) => {
   return certdataURL;
 };
 
-const normalizeTD = (text) => {
+const normalizeTD = (text = '') => {
   // Remove whitespace and any HTML tags.
   return text?.trim().replace(/<.*?>/g, '');
 };