Cloudflare requires either API Token or email/global key

[andrew-welch]

Describe the bug
Currently the API Token and Global Key share the same variable, so there is a chance that a user will add an API Token and Email, which triggers the Global Key authentication method and fails.

To Reproduce
Steps to reproduce the behavior:

1. Set up a repo in GitHub, and API Token in Cloudflare
2. Add ACCOUNT_EMAIL, API_TOKEN, and ACCOUNT_ID secrets.
3. Attempt to run workflow.
4. Error: "Error fetching deployments"

Expected behavior
Login can happen with either the API Key or the Email/Global Key, whether email is set or not.
Global Key should use a different variable name.

Additional context
This issue is caused when ACCOUNT_EMAIL, API_TOKEN, and ACCOUNT_ID are all set up. The presence of ACCOUNT_EMAIL seems to trigger the Global API key authentication approach:

//cloudflare.js:23

const headers = accountEmail
    ? {
        'X-Auth-Key': token,
        'X-Auth-Email': accountEmail
      }
    : {
        Authorization: `Bearer ${token}`
      }