Update Germany West Central region for stretched clusters

[BdennisB]

We only offer AV48 now in GWC for Streched clusters

[prmerger-automator[bot]]

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

[learn-build-service-prod[bot]]

Learn Build status updates of commit 0dd5784:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
articles/azure-vmware/architecture-stretched-clusters.md	:white_check_mark:Succeeded

For more details, please refer to the build report.

[ttorble]

@jjaygbay1

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

[v-ccolin]

I sent an email to the content owner today.

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