ARROW-4361: [Website] Update commiters list

This PR add my affiliation and fix my ASF id.

Author: Yosuke Shiro <yosuke.shiro615@gmail.com>

Closes #3474 from shiro615/website-update-commiters-list and squashes the following commits:

576fe6ac <Yosuke Shiro> Add affiliation
dcf9cf30 <Yosuke Shiro>  Fix Apache id
diff --git a/committers.html b/committers.html
index a8eff5b..36543e8 100644
--- a/committers.html
+++ b/committers.html
@@ -212,8 +212,8 @@
 <tr>
 <td>Yosuke Shiro</td>
 <td>Committer</td>
-<td>shiro615</td>
-<td></td>
+<td>shiro</td>
+<td>Red Data Tools</td>
 </tr>
 <tr>
 <td>Romain Francois</td>