Update Getting Started Guide links in README.md

Author: mtschoen

README.md

@@ -18,10 +18,10 @@ Experimental means this:
 - As such, there is no guarantee that this will remain an actively supported project.
 
 ## Getting Started
-If you've made it here, but aren't accustomed to using GitHub, cloning repositories, etc. and are simply looking to give EditorXR a spin, then take a look at the [Getting Started Guide](https://docs.google.com/document/d/1RD0SAjWnXdtY6eOC4qHk_fcl7w2-aBGrF3rX5pk5KDo). Once you're up and running we recommend you join the discussion on the [EditorXR forum](https://forum.unity3d.com/forums/editorvr.126/).
+If you've made it here, but aren't accustomed to using GitHub, cloning repositories, etc. and are simply looking to give EditorXR a spin, then take a look at the [Getting Started Guide](https://docs.google.com/document/d/1Rymrri54MeUO1UE8pev0Tss9dMAcltECOF7NAAO5XuE). Once you're up and running we recommend you join the discussion on the [EditorXR forum](https://forum.unity3d.com/forums/editorvr.126/).
 
 ## For Software Developers
-If you're a developer, we recommend that you take a look at the [Getting Started Guide](https://docs.google.com/document/d/1RD0SAjWnXdtY6eOC4qHk_fcl7w2-aBGrF3rX5pk5KDo) *and* the companion document [Extending EditorXR](https://docs.google.com/document/d/1EGi9hKXAujfBMI2spErojdqRc0giqEnOu0NpwgBxtpg). You'll need to clone the repository into an existing project using the instructions below.
+If you're a developer, we recommend that you take a look at the [Getting Started Guide](https://docs.google.com/document/d/1Rymrri54MeUO1UE8pev0Tss9dMAcltECOF7NAAO5XuE) *and* the companion document [Extending EditorXR](https://docs.google.com/document/d/1EGi9hKXAujfBMI2spErojdqRc0giqEnOu0NpwgBxtpg). You'll need to clone the repository into an existing project using the instructions below.
 
 ### Git Dependencies
 - [git-lfs](https://git-lfs.github.com/)