Docs for 1.20.4 and 1.20.5

[piyush-jena]

Issue number:

Closes # n/a

Description of changes:

• Increments metadata for 1.20.5
• Adds GPU variant info
• Adds packages/versions info

Note: with the exception of incrementing the patch version in current.toml, this is all generated from bottlerocket sources.

Terms of contribution:

By submitting this pull request, I confirm that my contribution is made under the terms of the licenses outlined in the LICENSE-SUMMARY file.