/etc/xdg/kxmlrpcclient.renamecategories is in libkf5xmlrpcclient-data 5.44.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1
log_kxmlrpcclient org.kde.pim.kxmlrpcclient