STYLE: correct syntax in header file of noise.C

Hi,

Could you update the syntax in the noise.C header file? Headerfile of noise.C and noiseDict should be consistent.

https://develop.openfoam.com/Development/OpenFOAM-plus/blob/master/applications/utilities/postProcessing/noise/noise.C

// Input file inputFile "postProcessing/faceSource1/surface/patch/patch.case"; should be

// Input file files ( "postProcessing/faceSource1/surface/patch/patch.case");

Best, Sebastien