Update default value for file sharing in chats

[mayurkl100]

No description provided.

[learn-build-service-prod]

Learn Build status updates of commit 03a3865:

✅ Validation status: passed

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teams/teams-ps/MicrosoftTeams/Set-CsTeamsFilesPolicy.md	✅Succeeded	View (teams-ps)

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[d-chetan]

Approved as per change in default behavior

[learn-build-service-prod]

Learn Build status updates of commit 4d1c11f:

❌ Validation status: errors

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	❌Error		Details

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[learn-build-service-prod]

Learn Build status updates of commit 4d1c11f:

✅ Validation status: passed

File	Status	Preview URL	Details
teams/teams-ps/MicrosoftTeams/Set-CsTeamsFilesPolicy.md	✅Succeeded	View (teams-ps)

For more details, please refer to the build report.