Add release notes for Forms RC2 versions

[rickbutterfield]

📋 Description

Adds release notes for Forms 13.7.0-rc2 and 16.2.0-rc2

📎 Related Issues (if applicable)

✅ 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)

Forms 13.7.0-rc2 and 16.2.0-rc2

Deadline (if relevant)

Today if possible (27th October)

📚 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-forms/release-notes.md

❌ 404 Not Found → https://github.com/umbraco/Forms/pull/1162 | Rejected status code (this depends on your "accept" configuration): Not Found

❌ 404 Not Found → https://github.com/umbraco/Forms/pull/1166 | Error (cached)

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

❌ 404 Not Found → https://github.com/umbraco/Forms/pull/1162 | Rejected status code (this depends on your "accept" configuration): Not Found

❌ 404 Not Found → https://github.com/umbraco/Forms/pull/1166 | Rejected status code (this depends on your "accept" configuration): Not FoundFull Github Actions output

[eshanrnh]

Thanks for the PR, @rickbutterfield 🙌 The PR looks great. I have only fixed the link formatting and removed the extra *.