Update list of supported boards in peripheral examples

Author: sandeepmistry

examples/Peripheral/BatteryMonitor/BatteryMonitor.ino

@@ -5,7 +5,8 @@
   level characteristic. The A0 pin is used to calculate the battery level.
 
   The circuit:
-  - Arduino MKR WiFi 1010 or Arduino Uno WiFi Rev2 board
+  - Arduino MKR WiFi 1010, Arduino Uno WiFi Rev2 board, Arduino Nano 33 IoT,
+    Arduino Nano 33 BLE, or Arduino Nano 33 BLE Sense board.
 
   You can use a generic BLE central app, like LightBlue (iOS and Android) or
   nRF Connect (Android), to interact with the services and characteristics

examples/Peripheral/ButtonLED/ButtonLED.ino

@@ -6,7 +6,8 @@
   represents the state of the button.
 
   The circuit:
-  - Arduino MKR WiFi 1010 or Arduino Uno WiFi Rev2 board
+  - Arduino MKR WiFi 1010, Arduino Uno WiFi Rev2 board, Arduino Nano 33 IoT,
+    Arduino Nano 33 BLE, or Arduino Nano 33 BLE Sense board.
   - Button connected to pin 4
 
   You can use a generic BLE central app, like LightBlue (iOS and Android) or

examples/Peripheral/CallbackLED/CallbackLED.ino

@@ -6,7 +6,8 @@
   library are used.
 
   The circuit:
-  - Arduino MKR WiFi 1010 or Arduino Uno WiFi Rev2 board
+  - Arduino MKR WiFi 1010, Arduino Uno WiFi Rev2 board, Arduino Nano 33 IoT,
+    Arduino Nano 33 BLE, or Arduino Nano 33 BLE Sense board.
 
   You can use a generic BLE central app, like LightBlue (iOS and Android) or
   nRF Connect (Android), to interact with the services and characteristics

examples/Peripheral/LED/LED.ino

@@ -5,7 +5,8 @@
   characteristic to control an LED.
 
   The circuit:
-  - Arduino MKR WiFi 1010 or Arduino Uno WiFi Rev2 board
+  - Arduino MKR WiFi 1010, Arduino Uno WiFi Rev2 board, Arduino Nano 33 IoT,
+    Arduino Nano 33 BLE, or Arduino Nano 33 BLE Sense board.
 
   You can use a generic BLE central app, like LightBlue (iOS and Android) or
   nRF Connect (Android), to interact with the services and characteristics