feat: Move from Cloudflare's API Key to API Token (#789)

Co-authored-by: Arthur Zapparoli <arthurgeek@users.noreply.github.com>

tmpl/kubernetes/cluster-secrets.sops.yaml

@@ -6,5 +6,5 @@ metadata:
   namespace: flux-system
 stringData:
   SECRET_DOMAIN: "${BOOTSTRAP_CLOUDFLARE_DOMAIN}"
-  SECRET_CLOUDFLARE_EMAIL: "${BOOTSTRAP_CLOUDFLARE_EMAIL}"
+  SECRET_ACME_EMAIL: "${BOOTSTRAP_ACME_EMAIL}"
   SECRET_CLOUDFLARE_TUNNEL_ID: "${BOOTSTRAP_CLOUDFLARE_TUNNEL_ID}"