Revert "Fix cert"

This reverts commit a76af68.

Author: WillNilges

infra/ansible/roles/knot_authoritative/templates/knot.conf.j2

@@ -132,7 +132,7 @@ acl:
     update-type: [TXT]
     update-owner-match: equal
     update-owner-name: acme-challenge.jenkins.mesh.nycmesh.net.
-    key: jenkins.mesh.nycmesh.net.
+    key: k8s.lb.prod1
 
 zone:
   - domain: mesh