Update known-issues-native.md

[lisaleehan]

deleted PiP clause and added CallKit clause

[prmerger-automator]

@lisaleehan : 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 b11522b:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/communication-services/concepts/voice-video-calling/known-issues-native.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

[ttorble]

@lisaleehan did you intend to open this PR in the private repo? It looks like you have access to the private repo, and if so, you should use that for content updates. I'll leave this PR open in case @sloanster wants to review it here.

@sloanster

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

[lisaleehan]

#sign-off

[prmerger-automator]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @sloanster

[lisaleehan]

@MicrosoftDocs/public-repo-pr-review-team #sign-off

[prmerger-automator]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @sloanster

[ttorble]

@lisaleehan

Only the listed author can sign off on updates made in the public repo azure-docs. You can request approval from the author or you can close this PR and make the change in the private repo azure-docs-pr.

It looks like you have access to the private repo but there's information in Get started contributing to the Microsoft Learn platform.

Read about authors working in the public repo for more information.