Upgrade net/routinator from 0.3.3 to O.4.0

Change log: https://github.com/NLnetLabs/routinator/releases/tag/v0.4.0

If you have been using previous releases of net/routinator check UPDATING file.

• Add an entry in UPDATING and fix typo in the previous entry

PR: 238335
Submitted by: Jaap Akkerhuis <jaap@NLnetLabs.nl>