fix(esp32): Set the maximum value of AnalogRead to 4095 (espressif#9114)

The 12-bit MAX is 4095, not 4096.

Author: tanakamasayuki

libraries/ESP32/examples/AnalogRead/AnalogRead.ino

@@ -2,7 +2,7 @@ void setup() {
   // initialize serial communication at 115200 bits per second:
   Serial.begin(115200);
 
-  //set the resolution to 12 bits (0-4096)
+  //set the resolution to 12 bits (0-4095)
   analogReadResolution(12);
 }