[Docs] Mark API published before v6.0.0 release

[arturcic]

We need to promote the PublicAPI.Unshipped.txt to PublicAPI.Shipped.txt using mark-shipped.ps1

[arturcic]

🎉 This issue has been resolved in version 6.0.0 🎉
The release is available on:

• GitHub Release
• Chocolatey Package
• .Net Global Tool

Your GitReleaseManager bot 📦🚀