Update content/hardware/03.nano/boards/nano-33-ble-sense/tutorials/cheat-sheet/ble-cheat-sheet.md

Co-authored-by: Karl Söderby <35461661+karlsoderby@users.noreply.github.com>

Author: BenjaminDannegard

content/hardware/03.nano/boards/nano-33-ble-sense/tutorials/cheat-sheet/ble-cheat-sheet.md

@@ -102,7 +102,6 @@ value = analogRead(pin, value);
 Pins **D2-D12** and **A0-A7** supports PWM (Pulse Width Modulation).
 ***Pins A4, A5 and D11, D12 are not recommended for PWM as they have I2C & SPI buses attached.***
 - A4
-- A6
 
 ```arduino
 analogWrite(pin, value);