[Bug]: Can't set env vars when deploying GitHub repo

### Problem description

I could have sworn this used to be supported but nowadays I can't set env vars before deploying my GitHub repo anymore.

### Steps to reproduce

1. Deploy from GitHub repo
2. Try to set env vars

### Expected behavior

Allow me to set env vars before hitting deploy

### Environment

_No response_

### Possible solution

_No response_

### Additional context

_No response_