Modify Azure Cognitive Search from Private Public Preview State

[farzad528]

Please provide us with the following information:

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [ ] feature request
- [x ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

Update README to revise Vector search capabilities in Azure Cognitive Search to no longer require sign up and point to public docs: https://learn.microsoft.com/azure/search/vector-search-overview

Any log messages given by the failure

Expected/desired behavior

OS and Version?

Windows 7, 8 or 10. Linux (which distribution). macOS (Yosemite? El Capitan? Sierra?)

Versions

Mention any other details that might be useful

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Thanks! We'll be in touch soon.

[luisquintanilla]

thanks @farzad528

Vector search is already in main and the signup comment has been removed.