release: update our release info and add examples

[0xc0170]

Docs issue template

https://os.mbed.com/docs/mbed-os/v6.12/introduction/versions-and-releases.html - this page should be updated. This does not reflect our current release process.

cc @ARMmbed/mbed-os-maintainers

[ciarmcom]

@0xc0170 This issue has an incomplete or old issue template.For future reference please use an up to date clone of the repository before raising issues. Many thanks.

[ciarmcom]

Thank you for raising this detailed GitHub issue. I am now notifying our internal issue triagers.
Internal Jira reference: https://jira.arm.com/browse/IOTOSM-4235