Here you go-
check this file later as well. /libs/dam/components/asseteditor/actions/versioning/versioning.jsp
I tried changing "There are currently no entries. " in line no. 167.
make sure to overlay it.
please check and let me know.
You can find the component used for this under /libs/dam/gui/coral/components/admin/timeline/events/activity and comment. You can overlay or extend based on your requirement. Since this is OOTB dam feature, better not tamper it unless strong usecase.