message: Fixed a link in CONTRIBUTING.md
diff: @@ -144,7 +144,7 @@ Origin](#developers-certificate-of-origin-11) at the end of this file.*
  - The `doc/` directory contains configuration for the Doxygen code documentation
  that can either be build locally, or browsed online at
  - http://mfem.github.io/doxygen.
  + http://mfem.github.io/doxygen/html/index.html.
  - The `data/` directory contains a collection of small mesh files, that are used
  in the simple example codes and more fully-featured mini applications in the
  