fix translate that may cause ambiguity

Author: LightBlueCube

src/main/resources/translations/OpalApplication_zh_CN.properties

@@ -70,7 +70,7 @@ Audiences=人群
 NetworkingEvent=交谈
 TribalFestival=部落庆典
 RugbyFootball=橄榄球比赛
-Sleepy=瞌睡
+Sleepy=困倦
 DrumTribalFestival=部落鼓乐
 Gong=锣
 MediaButtons=播放按钮