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

73% 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

@@ -497,7 +497,8 @@
     </message>
     <message>
         <source>Balance Performance</source>
-        <translation type="unfinished"/>
+        <translation>Сбалансированная Производительность
+</translation>
     </message>
 </context>
 <context>