When placing an audio call via EC to a group chat, the call intent is set to "video"

### Steps to reproduce

1. Place an audio call to a group chat and join the call
2. In `/devmode` look at the `m.rtc.notification` event and the`m.call.member` events

### Outcome

#### What did you expect?
The `call_intent` in the `m.rtc.notification` event and the`m.call.member` events to be `audio`

#### What happened instead?
The `call_intent` in the `m.rtc.notification` event and the`m.call.member` events was `video`

### Operating system

_No response_

### Browser information

Firefox, x64, Linux

### URL for webapp

app.element.io

### Application version

Element version: 1.12.15 Crypto version: Rust SDK 0.16.0 (1ac734e), Vodozemac 0.9.0

### Homeserver

mozilla.org

### Will you send logs?

Yes