Update lnd external support (#424)

* Add LND external support

* Minor edit regarding power delivery warning on Restore page

* Link and copy fixes

* section edits for clarity

* Cert name fixes

site/source/user-manual/upgrade-hardware/index.rst

@@ -12,13 +12,13 @@ Upgrade Hardware
   <div class="grid-x grid-margin-x">
 
 .. topic-box::
-  :title: Upgrading Hardware
+  :title: 2022 One to Pro Migration
   :link: upgrade-pro
   :icon: scylla-icon scylla-icon--enterprise
   :class: large-5
   :anchor: Upgrade
 
-  This is for migrating from one server to another
+  This is for migrating from a Server One (Raspi) to Server Pro
 
 .. topic-box::
   :title: Upgrade to all-in-one NASPi case

site/source/user-manual/upgrade-hardware/upgrade-pro.rst

@@ -1,8 +1,8 @@
 .. _upgrade-pro:
 
-==================================================
-Transferring From Server One to Server Pro (NASPi)
-==================================================
+===============================================
+Transferring From 2022 Server One to Server Pro
+===============================================
 
 This guide is for Server One users upgrading from a NASPi (pictured below). If you're using a Samsung T5/T7 please go :ref:`here <samsung-drives>`.