Unable to deploy to target site

### Action config

```
- uses: FirebaseExtended/action-hosting-deploy@v0
with:
repoToken: '${{ secrets.GITHUB_TOKEN }}'
firebaseServiceAccount: '${{ secrets.FIREBASE_SERVICE_ACCOUNT_APP }}'
projectId: my-awesome-project
channelId: live
target: staging
```

### Error message

There's no error if channelId is set to "live". However, if it's removed, I get an error saying "error": "channelID is currently required"

### Expected behavior

I expect the behavior to be the exact same of `firebase deploy --only hosting:staging`. The code should deploy to the target site.

### Actual behavior

If channelId is blank, error
if channelId is live, I get the following success message
```
details_url: 'https://production-app.web.app/',
27
conclusion: 'success',
28
output: ***
29
title: 'Production deploy succeeded',
30
summary: '[production-app.web.app](https://production-app.web.app/)'
31
***
```

Which is weird because nothing actually deployed to my production site. It's the exact same. Also, if I go to https://staging-app.web.app (which is connected to my staging target), nothing has changed either