[jlreq] [simple-ruby] Change title to indicate Japanese (#196)

r12a has just created a new issue for https://github.com/w3c/jlreq:

== [simple-ruby] Change title to indicate Japanese ==
The document is really concerned about Japanese typesetting, and there are some differences between Japanese and Chinese use of ruby and its associated markup & styling.

Therefore, i suggest that we make the title "Rules for Simple Placement of Japanese Ruby".

Please view or discuss this issue at https://github.com/w3c/jlreq/issues/196 using your GitHub account