tls: fix typo

`byteLenth` -> `byteLength`.

PR-URL: #38129
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

lib/_tls_common.js

@@ -364,7 +364,7 @@ exports.createSecureContext = function createSecureContext(options) {
     if (ticketKeys.byteLength !== 48) {
       throw new ERR_INVALID_ARG_VALUE(
         'options.ticketKeys',
-        ticketKeys.byteLenth,
+        ticketKeys.byteLength,
         'must be exactly 48 bytes');
     }
     c.context.setTicketKeys(ticketKeys);