Fix High_Level-Bindings-APIs link

mojo/edk/embedder/README.md

 # Mojo Embedder Development Kit (EDK)
 This document is a subset of the [Mojo documentation](/mojo).
 
 [TOC]
 
 ## Overview
 
 The Mojo EDK is a (binary-unstable) API which enables a process to use Mojo both
 internally and for IPC to other Mojo-embedding processes.
 
@@ skipping 304 matching lines @@
 
 interface Foo {
   DoSomeStuff(int32 n);
 };
 ```
 
 Once you've bootstrapped your process connection with a real mojom interface,
 you can avoid any further mucking around with EDK APIs or raw message pipe
 handles, as everything beyond this point - including the passing of other
 interface pipes - can be handled eloquently using
-[public bindings APIs](/mojo#High-Level-Bindings-APIs).
+[public bindings APIs](/mojo#High_Level-Bindings-APIs).
 
 ## Setting System Properties
 
 The public Mojo C System API exposes a
 [**`MojoGetProperty`**](/mojo/public/c/system#MojoGetProperty) function for
 querying global, embedder-defined property values. These can be set by calling:
 
 ```
 mojo::edk::SetProperty(MojoPropertyType type, const void* value)
 ```