Docs Site Links Broken

[rosibaj]

String search from github:

https://github.com/icgc-dcc/dcc-docs/search?q=https%3A%2F%2Ficgc.org

All instances of icgc.org need to be resolved.

waiting on #708 first

[junjun-zhang]

some of these instaces are shortened URLs, eg, https://icgc.org/ZEA, which is broken as reported in #715

[rosibaj]

Still waiting on deploy of the new short URL system before adjusting the links - will update once that is deployed.