Small mistake in documentation

[F-Schmidt99]

In class SensirionI2CSht4x.cpp the documentation says (line 53):

* @param serial Arduino stream object to be communicated with.

Should be:

* @param i2cBus Arduino stream object to be communicated with.

[psachs]

Thanks for pointing that out, we will fix the documentation in an updated version

[LeonieFierz]

the comment is fixed on master