fix: support Gitea 28.0.0 mail templates

themes/terra/mail/repo/release.tmpl

@@ -100,7 +100,7 @@
               {{end}}
               {{if .Release.Attachments}}
                 {{range .Release.Attachments}}
-                  <li><a href="{{.DownloadURL}}">{{.Name}} ({{.Size | FileSize}})</a></li>
+                  <li><a href="{{.DownloadURL}}">{{.Name}} ({{.Size | FormatByteSize}})</a></li>
                 {{end}}
               {{end}}
             </ul>
@@ -155,4 +155,4 @@
     </table>
   </center>
 </body>
-</html>
+</html>