Merge pull request #496 from dmnlk/hotfix/ja_broken_risky-tests_link

[ja] fix risky-tests chapter id

Author: m-takagi

src/5.5/ja/risky-tests.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8" ?>
 
-<chapter id="strict-mode">
+<chapter id="risky-tests">
   <title>リスクを伴うテスト</title>
 
   <para>