Here: link
I hope the link works. In case it does not work for you, you can try googling the following yourself: nachrichten für luftfahrer “2023-1-2792”
(Don’t google NfL, you’ll only find american football games for the 2023 season :D )
EDIT: PS. this looks like the document has been placed, perhaps by mistake, on a server from the Saxony state. Not sure whether it will remain there or not – particularly if DFS or LBA want to cash in on it (which is a shame if you ask me. Those documents, as well as others such as AIP, should be available free of charge!)
Thank you Peter!