[elisa][zh_CN] Fix duplicate colon in “Auth or” field translation

Hello,

I found a small issue in the zh_CN translation of Elisa.  
In the “Author” field, the string is currently rendered with a duplicate colon, e.g.:

  作者：：xxx

It should be:

  作者：xxx

I have fixed this in the elisa.po file.  
Please find the patch attached (generated with `svn diff`).  

Thank you for reviewing and applying this correction.

Best regards,  
DeepChirp

Index: elisa.po
===================================================================
--- elisa.po	(版本 1719282)
+++ elisa.po	(工作副本)
@@ -182,7 +182,7 @@
 #, kde-format
 msgctxt "@label as in 'Created by: Joe'"
 msgid "Created by"
-msgstr "作者："
+msgstr "作者"
 
 #: models/lyricsmodel.cpp:159
 #, kde-format