Update whats new 3 47

[lamek]

Update What's new in the docs for Flutter 3.47

Presubmit checklist

• If you are unwilling, or unable, to sign the CLA, even for a tiny, one-word PR, please file an issue instead of a PR.
• If this PR is not meant to land until a future stable release, mark it as draft with an explanation.
• This PR follows the Google Developer Documentation Style Guidelines—for example, it doesn't use i.e. or e.g., and it avoids I and we (first-person pronouns).
• This PR uses semantic line breaks
  of 80 characters or fewer.

[gemini-code-assist]

Code Review

This pull request archives the Flutter 3.35 release notes to the archive page and adds the new release notes for Flutter 3.47. The review feedback points out several violations of the Google Developer Documentation Style Guidelines regarding the use of first-person pronouns like 'we', suggesting neutral phrasing instead. Additionally, it identifies an unused link reference that should be cleaned up.

[flutter-website-bot]

Staged preview of the updated docs.flutter.dev site (updated for commit 5ade07a):

https://flutter-docs-prod--docs-pr13722-update-whats-new-3-47-ux3gya71.web.app

[flutter-website-bot]

Staged preview of the updated flutter.dev site (updated for commit 5ade07a):

https://flutter-dev-230821--www-pr13722-update-whats-new-3-47-a8e23vgw.web.app

[conooi]

Some suggestions for active voice but otherwise lgtm!

[lamek]

Excellent. I also added these general guidelines to the skill.