Update content.md (#1762)

In Analog Inputs sketch:
const float VOLTAGE_MAX = 3.0; changed to const float VOLTAGE_MAX = 3.3;
const float DIVIDER = 0.3; changed to const float DIVIDER = 0.3034;

Changed driven by R&D HW feedback.

Author: Fr4ng

content/hardware/07.opta/opta-family/opta/tutorials/01.user-manual/content.md

@@ -244,9 +244,9 @@ The sketch below shows how to monitor analog voltages on Opta's input terminals
 */
 
 // Define constants for voltage, resolution, and divider.
-const float VOLTAGE_MAX   = 3.0;      // Maximum voltage that can be read
+const float VOLTAGE_MAX   = 3.3;      // Maximum voltage that can be read
 const float RESOLUTION    = 4095.0;   // 12-bit resolution
-const float DIVIDER       = 0.3;      // Voltage divider
+const float DIVIDER       = 0.3034;      // Voltage divider
 
 // Array of terminals.
 const int TERMINALS[] = {A0, A1, A2};