symas gpg-key

I installed the symas OpenLDAP 2.6. The first step was getting the gpg-key but the command on your web-page is : ---------------- root@ldap:~# apt-key adv --keyserver keyserver.ubuntu.com --recv-keys DA26A148887DCBEB Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)). ---------------- is deprecated on debian 11. Do you provide a the key in .asc format so the key can be installed via: ---------------- wget -O- https://some-server.com/symas.gpg-key.asc | gpg --dearmor | tee /etc/apt/trusted.gpg.d/symas.gpg > /dev/null ----------------

If you do, where can I find it? If not, could you provide it? :-)

Stefan