2.9.42.1

This is a scheduled release with tested support for Juju 2.9.42

What's Changed

• Prepare 2.9.38.1 by @juanmanuel-tirado in #790
• [JUJU-2935] update juju 2942 by @juanmanuel-tirado in #809
• Release 2.9.42.1 notes by @juanmanuel-tirado in #810

Full Changelog: 2.9.38...2.9.42.1