feat(l10n): update Chinese (Simplified) translation from Weblate

translations/zh_CN.ts

@@ -101,7 +101,7 @@ which may lead to problems with video calls.</source>
     </message>
     <message>
         <source>Use slider to set the volume of your speakers.</source>
-        <translation>使用滑块设置扬声器的音量。</translation>
+        <translation>拖动滑块调整音量.</translation>
     </message>
     <message>
         <source>Transmitted audio quality. Lower this setting if your bandwidth is not high enough or if you want to reduce bandwidth usage.</source>
@@ -2491,11 +2491,11 @@ This ID includes the NoSpam code (in blue), and the checksum (in gray).</source>
     </message>
     <message>
         <source>Failed to load chat history</source>
-        <translation type="unfinished"></translation>
+        <translation>无法加载聊天记录</translation>
     </message>
     <message>
         <source>Database version (%1) is newer than we currently support (%2). Please upgrade qTox.</source>
-        <translation type="unfinished"></translation>
+        <translation>数据库版本 (%1) 比我们当前支持的 (%2) 更新。请升级 qTox 。</translation>
     </message>
 </context>
 <context>