fix Metal token env var name

Author: ctreatma

.github/workflows/ansible-tests-pr.yml

@@ -66,5 +66,5 @@ jobs:
         run: make testall
         working-directory: .ansible/collections/ansible_collections/equinix/cloud
         env:
-          METAL_API_TOKEN: ${{ secrets.METAL_API_TOKEN }}
+          METAL_AUTH_TOKEN: ${{ secrets.METAL_AUTH_TOKEN }}