Updates testing snapshot for syslog name for SMTP w/ proxy

Author: DougReeder

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

@@ -88,7 +88,7 @@ manifest should match snapshot:
 
         # Smtp with proxy
         12525     inet  n       -       n       -       1       postscreen
-          -o syslog_name=postfix/smtp-proxy
+          -o syslog_name=postfix/smtpd-proxy
           -o postscreen_upstream_proxy_protocol=haproxy
           -o postscreen_cache_map=btree:$data_directory/postscreen_10025_cache
         EOS