Enable GitHub pages for Concurrency RI

The github repo can be found at: https://github.com/eclipse-ee4j/concurrency-ri

Can the existing "gh-pages" branch be the branch for this project's GitHub pages?

If you have to select a theme, then please choose "Minimal".

assigned to @fgurr

Done.

=> https://eclipse-ee4j.github.io/concurrency-ri/

closed