[PLEASE SQUASH] Update SQL Server Express edition specifications

[kapsiR]

Updated SQL Server Express edition memory and database size limits to SQL Server 2025.

[prmerger-automator]

@kapsiR : 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 70deef7:

✅ Validation status: passed

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azure-sql/virtual-machines/windows/pricing-guidance.md	✅Succeeded

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[v-regandowner]

@dplessMSFT

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 856314e:

✅ Validation status: passed

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azure-sql/virtual-machines/windows/pricing-guidance.md	✅Succeeded

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit 78aaabd:

✅ Validation status: passed

File	Status	Preview URL	Details
azure-sql/virtual-machines/windows/pricing-guidance.md	✅Succeeded

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit 708cc82:

✅ Validation status: passed

File	Status	Preview URL	Details
azure-sql/virtual-machines/windows/pricing-guidance.md	✅Succeeded

For more details, please refer to the build report.