doc: release-notes: Added LoRa to the release-notes

Mention new LoRa support in the release-notes.

Signed-off-by: Alexander Wachter <[email protected]>

Author: alexanderwachter

doc/releases/release-notes-2.2.rst

@@ -269,6 +269,11 @@ Drivers and Sensors
 
   * <TBD>
 
+* LoRa
+
+  * Added APIs and drivers needed to support LoRa technology by reusing the
+    LoRaMac-node library.
+
 * Modem
 
   * <TBD>
@@ -355,9 +360,10 @@ Build and Infrastructure
 Libraries / Subsystems
 ***********************
 
-* Random
+* LoRa
 
-  * <TBD>
+  * LoRa support was added through official LoRaMac-node reference
+    implementation.
 
 HALs
 ****