Translations update from Weblate (#2195)

Co-authored-by: Jan Hladik <jan.hladik@iquentin.cz>
Co-authored-by: Anaa Ara <martakanuu@protonmail.com>
Co-authored-by: LL Magical <lolayami2004@gmail.com>
Co-authored-by: Jakub Fabijan <animatorzPolski@gmail.com>
Co-authored-by: Hahato Toshino <ameer.amino95@gmail.com>
Co-authored-by: Nathan <bonnemainsnathan@gmail.com>
Co-authored-by: Oğuz Ersen <oguzersen@protonmail.com>
Co-authored-by: ikmaak <info@ikmaak.nl>
Co-authored-by: Kevin Papst <kevin@kevinpapst.de>

translations/messages.nl.xlf

@@ -1114,6 +1114,10 @@
         <source>attachments</source>
         <target>Bestanden</target>
       </trans-unit>
+      <trans-unit id="sum.total">
+        <source>sum.total</source>
+        <target>Totaal</target>
+      </trans-unit>
     </body>
   </file>
 </xliff>