16.0.0-rc.2

Bugfix

• Overhaul how block defaults are computed. See #3925 for more details @tiberiuichim
• Cover an additional edge case for defaults @tiberiuichim

Internal

• Update to Plone 6 RC1 @sneridagh

Documentation

• Document Sentry integration move from Volto core to add-on @plone-collective/volto-sentry in configuration, upgrade and deployment. @ksuess
• Remove sentryOptions from settings reference. Clean up deploying/sentry.md. @stevepiercy
• Tidy up upgrade-guide/index.md. @stevepiercy