Fix a person's name.

kubo · kubo · commit ee646786434f · 2015-03-13T18:13:27.000+09:00
diff --git a/preface.textile b/preface.textile
@@ -212,7 +212,7 @@ I'd like to extend warmest thanks from my heart.
 | Kenichi Tamura |
 | Morikyu |
 | Yuya Kato |
-| Yasuhiro Kubo |
+| Takehiro Kubo |
 | Kentaro Goto |
 | Tomoyuki Shimomura |
 | Masaki Sukeda |
