Update cross-tenant-mailbox-migration.md

[WillemSnijder]

Updated the Domain Sharing link to aka.ms/domainsharingpreview instead of aka.ms/domainshringpreview

[opbld30]

Docs Build status updates of commit 4d8bca3:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
microsoft-365/enterprise/cross-tenant-mailbox-migration.md	:white_check_mark:Succeeded

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

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[opbld32]

Docs Build status updates of commit 36087ef:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
microsoft-365/enterprise/cross-tenant-mailbox-migration.md	:white_check_mark:Succeeded

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

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• Post your question in the Docs support channel

[yogkumgit]

@kelleyvice-msft Please merge this PR. Thanks

[opbld30]

Learn Build status updates of commit 971c956:

:white_check_mark: Validation status: passed

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel