Add documentation to enable webcam and microphone in snap distro

[MurzNN]

Pre-flight Checklist

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• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Description of Change

Add note about fixing webcam and microphone access in Snap packages

Motivation and Context

Not all users know that they need manually permit access to microphone and webcam in snap packages.

Checklist

• My pull request is properly named
• The changes respect the code style of the project (npm run prepare-code)
• npm test passes
• I tested/previewed my changes locally

Release Notes

notes: Added note for Snapcraft portal how to give access to webcam and microphone.

[vraravam]

@all-contributors please add @MurzNN for build

[allcontributors]

@vraravam

I couldn't determine any contributions to add, did you specify any contributions?
Please make sure to use valid contribution names.

[vraravam]

@all-contributors please add @MurzNN for code

[allcontributors]

@vraravam

I've put up a pull request to add @MurzNN! 🎉