[Documentation] ArduinoModbus Server, wrong return value for configure* functions

[wayofka]

In documentation for ArduinoModbus library, all configure function for Server have wrong return value in documentation.
For example https://www.arduino.cc/en/ArduinoModbus/ModbusServerconfigureDiscreteInputs
The function allocate memory for Moddus registers and coils.

Returns
0 on success, 1 on failure 

Return should be ( according to source code )
-1 Invalid argument
0 on failure
1 on success

Same for all configure function

[prath06]

I want to contribute on this.

[per1234]

@prath06 I appreciate your interest in contributing to the Arduino project. Unfortunately, the documentation content is not hosted in a public repository, so it will not be possible for you to assist with this.

The same goes for the other issue you commented on (#10800 (comment)).

I'm sure you will find many other opportunities to contribute to the Arduino open source community.