docs(v8): Edge has been rebuilt on top of Chromium (#585)

* docs(v8): Edge has been rebuilt on top of Chromium

According to the following announcements:
- chakra-core/ChakraCore#5865
- chakra-core/ChakraCore#6384
- https://blogs.windows.com/windowsexperience/2018/12/06/microsoft-edge-making-the-web-better-through-more-open-source-collaboration/#IIycUFupVTBcbAY5.97

Co-authored-by: Nick Schonning <nschonni@gmail.com>
Co-authored-by: Myles Borins <mylesborins@github.com>

src/documentation/0006-v8/index.md

@@ -19,7 +19,7 @@ Other browsers have their own JavaScript engine:
 
 * Firefox has [**SpiderMonkey**](https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey)
 * Safari has [**JavaScriptCore**](https://developer.apple.com/documentation/javascriptcore) (also called Nitro)
-* Edge has [**Chakra**](https://github.com/Microsoft/ChakraCore)
+* Edge was originally based on [**Chakra**](https://github.com/Microsoft/ChakraCore) but has more recently been [rebuilt using Chromium](https://support.microsoft.com/en-us/help/4501095/download-the-new-microsoft-edge-based-on-chromium) and the V8 engine.
 
 and many others exist as well.