Update manage-windows-copilot.md

[slowsmokeyjoe]

Need somewhere to simply explain the similarities and differences between Copilot in Windows compared to Microsoft 365 Copilot.

Why

• Closes #[Issue Number]

Changes

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[mestew]

@slowsmokeyjoe thanks for noticing that we should be mentioning the various Microsoft Copilot experiences. Some of these have recently changed, such as Copilot on Windows no longer directly making changes to system settings, and there's an article to help explain the different Microsoft Copilot experiences. Since this article will contain the most up-to-date info, we have added it as an informational link at the top of the page to help. You should see the change soon. Thanks for the contribution!