[css-text] Better label for justification demo

--HG--
extra : rebase_source : 863fea3b61d42df3f785b52054297b6ce4ed66a3

Author: fantasai

css-text/justify.html

@@ -12,7 +12,7 @@ <h1>Universal Default Justification Experiment</h1>
 
 <form action="">
 <label>Text to Justify: <textarea name=text id=text>서울특별시(서울特別市)는 한반도</textarea></label>
-<label>Space-CJK Threshold: <input id=cjk name=cjk value=0.67></label>
+<label>Space Expansion Limit: <input id=cjk name=cjk value=0.67></label>
 <!-- <label>Space-SEA Threshold: <input id=sea name=sea value=2.67></label> -->
 <label>Split Hangul-Han: <input type=checkbox name=splitHangul id=splitHangul></label>
 <ul>