common-updater-scripts,directoryListingUpdater: handle ${pname}_${version} file names

these are found for example in wikimedia's directories:
<https://dumps.wikimedia.org/other/kiwix/zim/wikipedia/>

pkgs/common-updater/scripts/list-directory-versions

···
         link_url = link.get("href", None)
         if link_url is not None:
             match = re.fullmatch(
-                rf"(.*/)?{args.pname}-([\d.]+?(-[\d\w.-]+?)?)(\.tar)?(\.[^.]*)", link_url
+                rf"(.*/)?{args.pname}[-_]([\d.]+?(-[\d\w.-]+?)?)(\.tar)?(\.[^.]*)", link_url
             )
             if match:
                 version = match.group(2)