localization: Rename Chinese translation file to match locale

This allows the file to be included in the language box
(Qt wasn't recognizing the "cn" suffix as a valid locale).

CMakeLists.txt

@@ -109,7 +109,7 @@ set(SQLB_MISC
 
 # Translation files
 set(SQLB_TSS
-	"${CMAKE_SOURCE_DIR}/src/translations/sqlb_cn.ts"
+	"${CMAKE_SOURCE_DIR}/src/translations/sqlb_zh.ts"
 	"${CMAKE_SOURCE_DIR}/src/translations/sqlb_de.ts"
 	"${CMAKE_SOURCE_DIR}/src/translations/sqlb_fr.ts"
 	"${CMAKE_SOURCE_DIR}/src/translations/sqlb_ru.ts"

src/src.pro

@@ -87,7 +87,7 @@ FORMS += \
     CipherDialog.ui
 
 TRANSLATIONS += \
-    translations/sqlb_cn.ts \
+    translations/sqlb_zh.ts \
     translations/sqlb_de.ts \
     translations/sqlb_fr.ts \
     translations/sqlb_ru.ts