Add Deploy 13.4.1 and 16.0.1 release notes

[ronaldbarendse]

📋 Description

Add Deploy 13.4.1 and 16.0.1 release notes

✅ Contributor Checklist

I've followed the Umbraco Documentation Style Guide and can confirm that:

• Code blocks are correctly formatted.
• Sentences are short and clear (preferably under 25 words).
• Passive voice and first-person language (“we”, “I”) are avoided.
• Relevant pages are linked.
• All links work and point to the correct resources.
• Screenshots or diagrams are included if useful.
• Any code examples or instructions have been tested.
• Typos, broken links, and broken images are fixed.

Product & Version (if relevant)

Deploy 13.4.1 and 16.0.1

Deadline (if relevant)

These patch versions will be released today.

📚 Helpful Resources

• 🧾 Umbraco Contribution Guidelines
• ✍️ Umbraco Documentation Style Guide

[github-actions]

The Link Checker found broken links in your PR.
Please review the following list:

Broken links found in:
13/umbraco-deploy/release-notes.md

⚓ Anchor not found → umbraco/Umbraco.Deploy.Issues#270 (comment) | Cannot find fragment

Broken links found in:
16/umbraco-deploy/release-notes.md

⚓ Anchor not found → umbraco/Umbraco.Deploy.Issues#270 (comment) | Cannot find fragmentFull Github Actions output

[eshanrnh]

Thanks for the PR, @ronaldbarendse 🙌 The PR looks great.