Adjust RBAC scope best-practices for SSH private keys

[FlorentATo]

This suggestion expends the list of exception to include user-scoped roles for reading individual private SSH key from Bastion UI.

This scenario allows cloud administrators to use of a single Key Vault instance to centrally manage users' private SSH keys, while restricting access to individual keys to said users using Azure RBAC.

This is useful in situations where letting users have a local copy of their private key isn't desired (e.g. for users with decentralized access).

URL: https://learn.microsoft.com/en-us/azure/key-vault/general/rbac-guide?tabs=azure-cli

[prmerger-automator]

@FlorentATo : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 5d6880a:

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[v-regandowner]

@msmbaldwin - Can you review the proposed changes?

IMPORTANT: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[learn-build-service-prod]

Learn Build status updates of commit a4e0ae5:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/key-vault/general/rbac-guide.md	✅Succeeded

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit f742998:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/key-vault/general/rbac-guide.md	✅Succeeded

For more details, please refer to the build report.

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[v-dirichards]

@msmbaldwin Could you review this proposed update to your article and enter #sign-off in a comment if it's ready to merge?

Thanks!

[v-dirichards]

@msmbaldwin

Can you review this old PR and determine whether it needs to be closed or merged?

@MicrosoftDocs/public-repo-pr-review-team

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[FlorentATo]

Any chance you could review this quick PR @msmbaldwin ?