Cloud External Login Providers - specify default claim name if none is added

[jesp209i]

📋 Description

External Login Providers for cloud environments and organizations

Specify what the default claim name is if none is provided

✅ 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)

Umbraco Cloud

[eshanrnh]

The PR looks great, @jesp209i 🙌 I added suggestions to fix the missing periods at the end of some sentences and to add the Note tag.