fix get started sequence links

src/pages/get-started/2-hello-world.md

@@ -108,4 +108,4 @@ These files and folders make up the structure of a Holochain application, with t
 
 Now it's time to try scaffolding your own application. Follow the instructions in the next guide to learn how to generate back-end and UI code.
 
-[Forum app tutorial →](../3-forum-app-tutorial/){.btn-purple}
+[Forum app tutorial →](/get-started/3-forum-app-tutorial/){.btn-purple}

src/pages/get-started/3-forum-app-tutorial.md

@@ -1129,4 +1129,4 @@ Save the file, then go back to the UI windows to see the changes. Try typing in
 
 Now that you've built a hApp, you can learn how to package it for distribution to your users.
 
-[Package your hApp →](../4-packaging-and-distribution/){.btn-purple}
+[Package your hApp →](/get-started/4-packaging-and-distribution/){.btn-purple}

src/pages/get-started/index.md

@@ -89,4 +89,4 @@ Congratulations! The Holochain development environment is now set up successfull
 
 Now it's time to download, compile, and try an example Holochain application.
 
-[Try 'Hello World' →](../2-hello-world/){.btn-purple}
+[Try 'Hello World' →](/get-started/2-hello-world/){.btn-purple}