fix link to plural rules

Author: shooda

public/index.html

@@ -185,7 +185,7 @@ <h2>The English Translation</h2>
               <code>$tabCount</code> variable. The names of the variants,
               <code>[one]</code> and <code>[other]</code>, are standard names
               of the plural categories defined by the Unicode in <a
-              href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html">CLDR</a>.
+              href="http://cldr.unicode.org/index/cldr-spec/plural-rules">CLDR</a>.
 
 
             </p>