Update boards.rst (#8851)

* Update boards.rst

* HW reference link

* Formatting fixes

* typo

* Devkits website link

* link fix

Author: VojtechBartoska

docs/source/boards/boards.rst

@@ -22,6 +22,8 @@ The ESP32 is divided by family:
     * Wi-Fi only
 * ESP32-C
     * Wi-Fi and BLE 5
+* ESP32-H
+    * BLE and IEEE 802.15.4  
 
 For each family, we have SoC variants with some differentiation. The differences are more about the embedded flash and its size and the number of the cores (dual or single).
 
@@ -71,6 +73,9 @@ Espressif
     ESP32-S2-Saola-1 <ESP32-S2-Saola-1>
     ESP32-C3-DevKitM-1 <ESP32-C3-DevKitM-1>
 
+.. note:: 
+   Only a few development boards are described on this documentation page. For more information about other Espressif development boards please refer to the `Espressif website <https://www.espressif.com/en/products/devkits>`_.
+
 Third Party
 -----------