[docs-scanner] Stale framing about Docker Engine 23.0 as recent version

[docker-agent]

File: content/manuals/build/buildkit/_index.md

Issue

The page frames Docker Engine 23.0 as a recent version requiring conditional instructions, but version 23.0 was released in 2023. The "Getting started" section provides instructions for enabling BuildKit on "earlier than 23.0" versions, which is likely outdated for most current users.

From the file:

"BuildKit is the default builder for users on Docker Desktop and Docker Engine v23.0 and later."

"If you are running a version of Docker Engine version earlier than 23.0, you can enable BuildKit either by setting an environment variable, or by making BuildKit the default setting in the daemon configuration."

This framing treats 23.0 as a dividing line worth documenting around, but it's now several years old.

Suggested fix

Either:

1. Remove the pre-23.0 instructions entirely if those versions are no longer supported
2. Move the pre-23.0 instructions to a collapsed section or separate legacy page
3. Reframe to acknowledge these are legacy instructions: "For Docker Engine versions earlier than 23.0 (released in 2023), you can enable BuildKit by..."

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