Release 0.6

[kate-osborn]

Issue to release 0.6.

Acceptance Criteria:

• The release process doc is updated to mention testing our examples before release.
• The release process doc is updated to mention how to update our conformance report with the Gateway API manually (or automated once 0.8 is released).

Full release process: https://github.com/nginxinc/nginx-kubernetes-gateway/blob/main/docs/release-process.md

[mpstefan]

Blocked by #761 and #961