docs: fix broken links in README and contribution guide

contribution.md

@@ -7,7 +7,7 @@ So you'd like to contribute some code, report a bug, or request a feature? You'r
   - [Opening a Pull Request](#opening-a-pull-request)
   - [Code Style](#code-style)
   - [Testing](#testing)
-  - [Releasing/Versioning](/docs/components/release-guidelines.md#user-content-releasingversioning)
+  - [Releasing/Versioning](https://github.com/Financial-Times/x-dash/wiki/Release-Guidelines)
 
 
 ## Reporting bugs

readme.md

@@ -8,10 +8,10 @@
 
 x-dash is new shared front-end components for FT.com and the FT Apps. A detailed introduction is available in [Google Slides].
 
-Check out the [getting started] guide to begin hacking on x-dash.
+Check out the [x-dash wiki] to begin hacking on x-dash.
 
 [Google Slides]: https://docs.google.com/presentation/d/1Z8mGsv4JU2TafNPIHw2RcejoNp7AN_v4LfCCGC7qrgw/edit?usp=sharing
-[getting started]: https://financial-times.github.io/x-dash/docs/get-started/installation
+[x-dash wiki]: https://github.com/Financial-Times/x-dash/wiki/What-is-x-dash
 
 ## How is that not Origami?