Describe the bug
When using workflow level environment variables they do not work when I use them to substitute for jobs.build.name or jobs.build.runs-on. See workflow file below for example:

name: Testing workflow leve env vars
on:
  push:
    branches:
      - develop

env:
  aws_account: cfaittoolsnp
  environment: dev

jobs:
  build:
    name: Deploy|${{ env.aws_account }}
    runs-on: ${{ env.aws_account }}
    steps:
    - name: Checkout
      uses: actions/checkout@v2
    - name: Init
      run: |
        echo ${{ env.aws_account }}

To Reproduce
Steps to reproduce the behavior:
1.- Run the workflow file above to receive the following error:
The workflow is not valid. .github/workflows/dev.yml (Line: 15, Col: 11): Unrecognized named-value: 'env'. Located at position 1 within expression: env.aws_account,.github/workflows/dev.yml (Line: 16, Col: 14): Unrecognized named-value: 'env'. Located at position 1 within expression: env.aws_account

Expected behavior
The expected behavior is that using the workflow file above the build.name would be Deploy|cfaittoolsnp and the build.runs-on would be cfaittoolsnp.

Runner Version and Platform

Running latest version of linux self-hosted runner.

OS of the machine running the runner? linux (ubuntu 18.04)