Fix error in "ES INFO" remote control call

[bparks13]

When returning INFO using the HTTP server, there is no delineation between the sample rate and the scale at this line:

ephys-socket/Source/EphysSocket.cpp

Line 366 in 69c5e40

return "Port = " + String (port) + ". Sample rate = " + String (sample_rate) + "Scale = " + String (data_scale) + ". Offset = " + String (data_offset) + ".";

The resulting output looks something like this: b'{"info":"Port = 9001. Sample rate = 30000Scale = 1. Offset = 0."}'