Fix failing test (which is not failing locally)

Author: cfis

charts/docker-mailserver/tests/__snapshot__/configmap_test.yaml.snap

@@ -2,7 +2,7 @@ manifest should match snapshot:
   1: |
     apiVersion: v1
     data:
-      dovecot.cf: |2
+      dovecot.cf: |
         haproxy_trusted_networks = 10.0.0.0/8 192.168.0.0/16 172.16.0.0/12
         service imap-login {
             inet_listener imap {