[Git] Add last_login to gitignore

.gitignore

@@ -36,6 +36,7 @@ data/conf/nginx/*.custom
 data/conf/nginx/*.bak
 data/conf/dovecot/acl_anyone
 data/conf/dovecot/mail_plugins*
+data/conf/dovecot/last_login
 data/conf/dovecot/sni.conf
 data/conf/dovecot/sogo-sso.conf
 data/conf/dovecot/extra.conf