apiextensions release v6.0.0

Mar 23, 2022 Platform API apiextensions v6.0.0

Changed

Upgrade CAPI to v1.0.4.
Upgrade CAPZ to v1.0.1.
Bump go module major version to v6.

Removed

Remove v1alpha2 legacy GiantSwarm APIs.

This part of our documentation refers to our vintage product. The content may be not valid anymore for our current product. Please check our new documentation hub for the latest state of our docs.