lambda promtail support EventBridge

**Is your feature request related to a problem? Please describe.**
I try to send logs from ECS Events by Event Bridge rule to lambda-promtail and then to loki but i get this error message

`level=error caller=main.go:207 err="error processing event: event bridge event type not supported"`

**Event bridge rule**
```
{
"source": ["aws.ecs"]
}
```

**Describe the solution you'd like**
to send logs from EventBridge to loki.