Update dotnet-voice-tone.md

[Rick-Anderson]

Contributor guide pull request

Thanks for contributing to the Microsoft Learn contributor guide. Please read these instructions for processing your pull request (PR). Once you've read this text, delete it and write a brief description of the changes you're proposing.

Quality control

• 1. Successful build with no warnings or errors: Review the build status to make sure all checks are green (Succeeded).

• 2. #Sign-off: Once the PR is finalized and ready to be merged, indicate so by typing #sign-off in a new comment in the PR. Signing off means the document is ready for review and can be published at any time.

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• Once all feedback on the PR is addressed, we'll merge the PR into the main branch.

Need help?

If you have an open PR, tag the PR reviewers in a comment with your question: @mikekinsman, @jehchow

[learn-build-service-prod]

Learn Build status updates of commit 43b9470:

✅ Validation status: passed

File	Status	Preview URL	Details
Contribute/content/dotnet/dotnet-voice-tone.md	✅Succeeded	View

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

[learn-build-service-prod]

Learn Build status updates of commit ca7c29a:

✅ Validation status: passed

File	Status	Preview URL	Details
Contribute/content/dotnet/dotnet-voice-tone.md	✅Succeeded	View

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