How to use DENO_AUTH_TOKENS for deploy

Hi,

I'm trying to integrate a new project that references some modules in a private GitHub repository. I'm using DENO_AUTH_TOKENS and import maps, and everything functions as expected in my local dev environment. However:

In "No build step" mode, as far as I know, I'm not allowed to set up these tokens.
When switching to a GitHub Actions workflow, I configured this environment variable at the root, but it fails at the "Upload to Deno Deploy" step with a "module not found" error.
Currently, my workflow file looks like this:

```yaml
name: Deploy
on:
push:
branches: main
pull_request:
branches: main

env:
DENO_AUTH_TOKENS: ${{ secrets.DENO_AUTH_TOKENS }}

jobs:
deploy:
name: Deploy
runs-on: ubuntu-latest

permissions:
id-token: write # Needed for auth with Deno Deploy
contents: read # Needed to clone the repository

steps:
- name: Clone repository
uses: actions/checkout@v3

- name: Install Deno
uses: denoland/setup-deno@v1
with:
deno-version: v1.x

- name: Build step
run: "deno task build"

- name: Upload to Deno Deploy
uses: denoland/deployctl@v1
with:
project: "my-project-name"
entrypoint: "main.ts" # 📝 Update the entrypoint if necessary
root: "." # 📝 Update the root if necessary

```

Any assistance would be greatly appreciated, and thank you for your incredible contributions!