Users don't know when to expect audio from screensharing

### Steps to reproduce

Try to screenshare with audio

### Outcome

We're not clear enough about the fact that some browsers (Firefox) don't do audio with screensharing. As a result, users blame the application when they are unable to share audio in these environments. Chrome does its own expectation management around sharing of audio (when you're trying to share a tab versus a window), but we need something additional to this.

On the other hand it's not clear what we *could* do. A warning pop-up every time you go to share your screen could be a bit over the top.

### Operating system

_No response_

### Browser information

_No response_

### URL for webapp

_No response_

### Will you send logs?

No