Fix LEDC PWM DutyCycle

[brentru]

This pull request updates the analogWrite function in src/components/ledc/ws_ledc.cpp to correct the calculation of the duty cycle for 12-bit resolution.

Key change:

• Updated the duty cycle calculation to use a more precise formula with type casting and floating-point arithmetic, ensuring accurate scaling for 12-bit resolution. The new formula replaces the integer division with floating-point division and casts value to uint32_t for consistency.

[tyeth]

This works well Brent, I tested on the scope, and confirmed by Tyler.
It was mentioned in Fridays meeting that Tyler's guide needs to ideally include the patched firmware, so I offered to release it instead.

[brentru]

Okay, glad it worked!