Elixir `capture_message` with stacktrace has title "message"

### Environment

Version 9.1.0
self hosted

### Steps to Reproduce

```elixir
{:current_stacktrace, stacktrace} = Process.info(self(), :current_stacktrace)
Sentry.capture_message("Test message please ignore", stacktrace: stacktrace)
```

### Expected Result

Where it says "message" in the Sentry UI I think it should contain the actual message.

### Actual Result

With Elixir with a stacktrace (produced with sample code above):

With Elixir without a stacktrace:

With Python with a stacktrace: