Added 17 specific upgrade steps to v17 tab

[eshanrnh]

📋 Description

📎 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)

Deadline (if relevant)

📚 Helpful Resources

• 🧾 Umbraco Contribution Guidelines
• ✍️ Umbraco Documentation Style Guide

[github-actions]

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Broken links found in: umbraco-cloud/optimize-and-maintain-your-site/manage-product-upgrades/product-upgrades/major-upgrades.md

⚠ Unknown error → [403] https://dotnet.microsoft.com/en-us/download/visual-studio-sdks |#124; Rejected status code (this depends on your "accept" configuration): Forbidden