Update the link for the nightly test status.
Update the link for the nightly test status to the web site on github.io.
Source code repository for the VisIt Scientific Visualization and Data Analysis Application
-[Project Website](https://visit.llnl.gov) | [Nightly Test Status](http://portal.nersc.gov/project/visit/)
+[Project Website](https://visit.llnl.gov) | [Nightly Test Status](https://visit-dav.github.io/dashboard/)
## Documentation
