fix: update auth key param

Author: sshrihar

.github/workflows/test_cloudflare_purge.yml

@@ -22,6 +22,6 @@ jobs:
         uses: nathanvaughn/actions-cloudflare-purge@master
         with:
           cf_zone: ${{ secrets.CLOUDFLARE_ZONE }}
-          cf_auth: ${{ secrets.CF_WORKER_API_TOKEN }}
+          cf_auth: ${{ secrets.CLOUDFLARE_AUTH_KEY }}
           hosts: polygon-docs.polygon.technology