Adds missing ml64 /quiet flag documentation

[MattBolitho]

The current ml64 command-line reference seems to be missing documentation for the /quiet flag. This flag seems to have been added about a year ago as a result of this CMake issue. I couldn't find much more about it online.

Running ml64 /? with version 14.41.34120.0 prints the following information: /quiet Suppress 'Assembling' message. This PR adds that text but conjugated like the other option descriptions in the table.

[prmerger-automator]

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

[learn-build-service-prod]

Learn Build status updates of commit 51560e6:

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[ShannonLeavitt]

@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

[MattBolitho]

@TylerMSFT is there anything specific needed for this one?

[TylerMSFT]

Thank you for adding this.

[TylerMSFT]

@MattBolitho , what version of VS does this become available in? We should note that if it is a new flag.

[MattBolitho]

@MattBolitho , what version of VS does this become available in? We should note that if it is a new flag.

It is available from 17.6. I will add that to the table entry when I get a chance!

[learn-build-service-prod]

Learn Build status updates of commit 9cfa81c:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/assembler/masm/ml-and-ml64-command-line-reference.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

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

[TylerMSFT]

Thanks, @MattBolitho. Sending this through.
#sign-off

[learn-build-service-prod]

Learn Build status updates of commit 095268e:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/assembler/masm/ml-and-ml64-command-line-reference.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

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

[TylerMSFT]

#sign-off