Update acquisition doc for vcpkg

[Eric Brumer (ericbrumer)]

Tell vcpkg customers how to choose a specific MSVC toolset.

[prmerger-automator]

Eric Brumer (@ericbrumer) : 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 2a07955:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
docs/overview/acquire-msvc.md	⚠️Warning		Details

docs/overview/acquire-msvc.md

• Line 202, Column 26: [Warning: hard-coded-locale - See documentation] Link 'https://learn.microsoft.com/en-us/vcpkg/users/triplets#vcpkg_platform_toolset_version' contains locale code 'en-us'. For localizability, remove 'en-us' from links to most Microsoft sites.
• Line 202, Column 26: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/en-us/vcpkg/users/triplets#vcpkg_platform_toolset_version' will be broken in isolated environments. Replace with a relative link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[prmerger-automator]

Eric Brumer (@ericbrumer) : 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 96d3841:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
docs/overview/acquire-msvc.md	⚠️Warning		Details

docs/overview/acquire-msvc.md

• Line 202, Column 26: [Warning: hard-coded-locale - See documentation] Link 'https://learn.microsoft.com/en-us/vcpkg/users/triplets#vcpkg_platform_toolset_version' contains locale code 'en-us'. For localizability, remove 'en-us' from links to most Microsoft sites.
• Line 202, Column 26: [Suggestion: docs-link-absolute - See documentation] Absolute link 'https://learn.microsoft.com/en-us/vcpkg/users/triplets#vcpkg_platform_toolset_version' will be broken in isolated environments. Replace with a relative link.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[learn-build-service-prod]

Learn Build status updates of commit 25cefec:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/overview/acquire-msvc.md	✅Succeeded

For more details, please refer to the build report.

[Regan Downer (v-regandowner)]

Tyler Whitney (@TylerMSFT)

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