ci: 👷 Move GITHUB_TOKEN into github-token secrets (#92)

# Description

Need to pass the `GITHUB_TOKEN` directly into the reusable workflow, not
use it outside.

No review needed.

Author: lwjohnst86

.github/workflows/build-website.yml

@@ -8,12 +8,10 @@ on:
 # Limit token permissions for security
 permissions: read-all
 
-# This is to allow using `gh` CLI
-env:
-  GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
 jobs:
   build-website:
     uses: seedcase-project/.github/.github/workflows/reusable-build-docs-with-python.yml@main
     secrets:
       netlify-token: ${{ secrets.NETLIFY_AUTH_TOKEN }}
+      # This is to allow using `gh` CLI
+      github-token: ${{ secrets.GITHUB_TOKEN }}