Change the "Brasilia" time zone to follow America/Sao_Paulo DST rules.

Previously it was using America/Araguaina, which does not currently observe
DST.  Brasilia is actually in an area that follows the Sao_Paulo rules.

Bug 2362824
diff --git a/res/xml-zh/timezones.xml b/res/xml-zh/timezones.xml
index 1129e7c..be269d1 100644
--- a/res/xml-zh/timezones.xml
+++ b/res/xml-zh/timezones.xml
@@ -19,7 +19,7 @@
     <timezone id="America/Manaus">亚马逊标准时间 (马瑙斯)</timezone>
     <timezone id="America/Santiago">圣地亚哥</timezone>
     <timezone id="America/St_Johns">纽芬兰时间 (圣约翰)</timezone>
-    <timezone id="America/Araguaina">阿拉瓜伊纳</timezone>
+    <timezone id="America/Sao_Paulo">圣保罗</timezone>
     <timezone id="America/Argentina/Buenos_Aires">布宜诺斯艾利斯</timezone>
     <timezone id="America/Godthab">戈特霍布</timezone>
     <timezone id="America/Montevideo">乌拉圭时间 (蒙得维的亚)</timezone>