fix(typo): Fix typo in docs

Signed-off-by: Joas Schilling <coding@schilljs.com>

lib/private/Session/Internal.php

@@ -121,7 +121,7 @@ class Internal extends Session {
 	 * Wrapper around session_regenerate_id
 	 *
 	 * @param bool $deleteOldSession Whether to delete the old associated session file or not.
-	 * @param bool $updateToken Wheater to update the associated auth token
+	 * @param bool $updateToken Whether to update the associated auth token
 	 * @return void
 	 */
 	public function regenerateId(bool $deleteOldSession = true, bool $updateToken = false) {