Fix links in quick_start_build.md

Update links.

Author: Amanda Butler

docs/reference/technology/mesh/quick_start_build.md

@@ -21,7 +21,7 @@ Option Name | Features supported | Binary size in Mbed OS 5.5
 
 If you want to optimize the flash usage, you need to select a proper configuration for Nanostack. The configuration depends mostly on the preferred use case.
 
-See [6LoWPAN overview](/docs/development/tutorials/mesh.html) for the definition of star and mesh networks. These same principles apply also to Thread protocol.
+See [6LoWPAN overview](/docs/development/reference/technology.html) for the definition of star and mesh networks. These same principles apply also to Thread protocol.
 
 Select the protocol the network is based on:
 
@@ -33,7 +33,7 @@ Select the device role:
 - Mesh network. A router. (default)
 - Star network. A non-routing device. Also known as a host, or sleepy host.
 
-Modify your `mbed_app.json` file to tell which Nanostack configuration to choose and which configrations to use on [Mbed Mesh API](/docs/v5.6/reference/mesh.html).
+Modify your `mbed_app.json` file to tell which Nanostack configuration to choose and which configrations to use on [Mbed Mesh API](/docs/development/reference/mesh-api.html).
 
 An example of the `mbed_app.json` file: