Update recently updated section in introduction.md

Add mesh updates to introduction.md.

Author: Amanda Butler

docs/introduction/introduction.md

@@ -102,9 +102,8 @@ Please see the following sections of our documentation for more information.
 
 <h2 id="docs-updates">Recently updated documentation</h2>
 
+- A [mesh tutorial](../tutorials/mesh-tutorial.html) about selecting and using a mesh protocol.
+- Guides to porting [IEEE 802.15.4 MAC driver](../porting/mac-port.html) and [IEEE 802.15.4 RF driver](../porting/6lowpan-port.html).
 - [A tutorial for sending data to Arm Treasure Data from an Mbed OS device](../mbed-os-pelion/send-data-securely-to-arm-treasure-data.html).
 - An [introduction to Mbed OS bare metal profile](../reference/mbed-os-bare-metal.html), and updates to the [quick start for a bare metal build](../quick-start/index.html).
-- New documentation for the [Mbed OS implementation of the Platform Security Architecture (PSA)](../apis/security.html) and [Mbed Crypto](../apis/mbed-crypto.html).
-- Updates to the [Mesh API documentation](../apis/mesh-api.html) and related reference material, including [the Wi-SUN Field Area Network (FAN)](../reference/wisun-tech.html).
-- A new guide [for using Pelion Device Management with Mbed OS devices](../mbed-os-pelion/device-management-for-mbed-os.html), and a new location [for our evaluation to production process review](../mbed-os-pelion/going-to-production.html).
 - New [USB APIs](../apis/usb.html).