Notifications for voice messages look like a file was sent

### Your use case

#### What would you like to do?
When receiving a voice message (e.g. from EXA), rather than sending a file name, just call it a voice message.

#### Why would you like to do it?
It's a bit easier to understand. I first notice the ".ogg", so I think I was sent an audio file, then I see the name is "voice-message-recording.ogg", and realize it's a voice message.

#### How would you like to achieve it?
Instead show just "voice message" with an emoji maybe? This would match what's done for call notifications.

I couldn't find a great emoji: looked for audio cassette, voice recorder, record player, etc. Best I found was either 🗣️ or 🎧. So something like:

"🗣️ voice message"
or
"🎧 voice message"

### Have you considered any alternatives?

_No response_

### Additional context

Here's what a voice message notification looks like to me on Firefox on Gnome:

Search the notification rendering code for the voice-message-recording.ogg filename and compare it with the existing call notification wording. The work is done when incoming voice-message notifications display a clear voice-message label, optionally with a suitable emoji, instead of the file name.

Written by the indexing model from the issue text.