[skip CI] Translate dde-dock.ts in ru

97% of minimum 50% translated source file: 'dde-dock.ts'
on 'ru'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

plugins/dde-dock/translations/dde-dock_ru.ts

@@ -596,7 +596,7 @@
     </message>
     <message>
         <source>%1 hr remaining</source>
-        <translation>Осталось %1 час.</translation>
+        <translation>Осталось %1 часов</translation>
     </message>
     <message>
         <source>Charging %1, %2 hr until full</source>