docs: update setup-java examples

[HarithaVattikuti]

Updated the documentation examples in README.md and docs/advanced-usage.md to use actions/checkout@v7 and actions/setup-java@v6. Also removed the obsolete V2 vs V1 section from the README.

Validation: docs-only change.

[Copilot]

Pull request overview

This PR updates documentation examples for actions/setup-java by bumping referenced action versions and removing an obsolete README section, aiming to keep user-facing workflow snippets current.

Changes:

• Update workflow examples to use actions/checkout@v7 and actions/setup-java@v6
• Remove the obsolete “V2 vs V1” section from README.md

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
README.md	Updates workflow snippets to newer action versions and removes the legacy migration section.
docs/advanced-usage.md	Updates many advanced workflow examples to newer action versions.

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[brunoborges]

Hey @HarithaVattikuti good finding! Just wondering if we should time this after the v6 release? Should we push that release by end of the month? I'd like to push v5.6 before that.

[HarithaVattikuti]

Hey @HarithaVattikuti good finding! Just wondering if we should time this after the v6 release? Should we push that release by end of the month? I'd like to push v5.6 before that.

Thanks @brunoborges — that makes sense. Since this PR is specifically for v6 docs, I think we should merge it alongside the v6 release. Let’s push v5.6 first, then merge this closer to the v6 release