Coordinate with bottlerocket releases - Version list outdated

**Path to page with content (_do not_ include domain name):**

/en/os/ - https://bottlerocket.dev/en/os/

**What content is incorrect?**

It lists 1.20 as current. 1.21 was released three weeks ago.

**What should the content say or communicate?**

Within a couple of hours, it would be nice to match the actual releases - https://github.com/bottlerocket-os/bottlerocket/releases

Consider having the docs as a routine step for each release - https://github.com/bottlerocket-os/bottlerocket/issues/4148

Start at the /en/os/ page source and compare its listed version with the Bottlerocket releases page linked in the issue. Update the page so it reflects the current release, then verify that the published version list matches the release information and consider the related routine discussed in issue 4148.

Written by the indexing model from the issue text.