adjust range slightly

Author: annevk

encoding.bs

@@ -2270,7 +2270,7 @@ consumers of content generated with <a>GBK</a>'s <a for=/>encoder</a>.
 
  <li><p>If <var>code point</var> is U+2212, set it to U+FF0D.
 
- <li><p>If <var>code point</var> is in the range U+FF65 to U+FF9F, inclusive, set it to the result
+ <li><p>If <var>code point</var> is in the range U+FF61 to U+FF9F, inclusive, set it to the result
  of normalizing <var>code point</var> using Normalization Form KC (NFKC). [[!UNICODE]]
  <!-- Katakana; halfwidth to fullwidth -->