Update list of required deps

Author: oschwald

README.dev.md

@@ -48,9 +48,8 @@ version updated promptly for some reason.
 
 # Prerequisites for releasing
 
-- Required packages (Ubuntu Artful): vim git-core dput build-essential autoconf
-  automake libtool git-buildpackage libfile-slurp-perl pandoc dirmngr
-  libfile-slurp-tiny-perl libdatetime-perl debhelper dh-autoreconf
+- Required packages (Ubuntu 25.10): vim git-core dput build-essential autoconf
+  automake libtool git-buildpackage lowdown dirmngr debhelper dh-autoreconf
   libipc-run3-perl libtest-output-perl devscripts
 - Install [gh](https://github.com/cli/cli/releases).
 - GitHub ssh key (e.g. in `~/.ssh/id_rsa`)