The Refresh token lifetime has been increased to 365 days. All newly issued refresh token will now expire after 365 days.
Please note that no new refresh token is issued when re-authenticating and there's already an existing active refresh token. Instead that refresh token, with its original expiry is returned. To get a new refresh token with the longer expiry before the currently active refresh token expires, revoke the refresh token use the Revoke an Access Token endpoint
See Refresh Tokens for more details.