Update dashboard-managed updates dev docs

[samin-cf]

Summary

Quick change to clarify that dashboard-managed updates do not require the user account to have admin privileges

Screenshots (optional)

Documentation checklist

• Is there a changelog entry (guidelines)? If you don't add one for something awesome and new (however small) — how will our customers find out? Changelogs are automatically posted to RSS feeds, the Discord, and X.
• The change adheres to the documentation style guide.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

[cloudflare-docs-bot]

Review coverage

🟡 1 ownership area needs approval.

Suggested reviewers: @cf-rhett

Needs approval	Eligible approvers	Suggested
cloudflare-one	@cf-rhett, @csujedihy, @jiulingz, @lpraneis, @tojens-ietf, @cloudflare/cf1-reviewers, @cloudflare/product-owners	cf-rhett

CODEOWNERS mappings for displayed areas (1)

Pattern	Owners
/src/content/docs/cloudflare-one/team-and-resources/devices/	@cf-rhett, @csujedihy, @jiulingz, @lpraneis, @tojens-ietf, @cloudflare/cf1-reviewers, @cloudflare/product-owners

[cloudflare-docs-bot]

Review

✅ No issues found in commit 3f93db6.

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