Fixed typo in code and updated comment
Fixed typo in code and updated comment

Fixed typo in code for creating default Logger Instance. 
And updated comment.
Code changes was done for Issue # 7031
MoaidHathot/NLog,FeodorFitsner/NLog,AqlaSolutions/NLog-Unity3D,AndreGleichner/NLog,breyed/NLog,rajeshgande/NLog,BrandonLegault/NLog,fringebits/NLog,rajk987/NLog,snakefoot/NLog,tmusico/NLog,rajk987/NLog,vbfox/NLog,tetrodoxin/NLog,UgurAldanmaz/NLog,campbeb/NLog,rajk987/NLog,bryjamus/NLog,tohosnet/NLog,babymechanic/NLog,kevindaub/NLog,Niklas-Peter/NLog,michaeljbaird/NLog,AndreGleichner/NLog,BrutalCode/NLog,RRUZ/NLog,BrutalCode/NLog,ArsenShnurkov/NLog,babymechanic/NLog,nazim9214/NLog,ajayanandgit/NLog,pwelter34/NLog,blair55/NLog,vladikk/NLog,MartinTherriault/NLog,FeodorFitsner/NLog,czema/NLog,matteobruni/NLog,kevindaub/NLog,thomkinson/NLog,tohosnet/NLog,littlesmilelove/NLog,RichiCoder1/NLog,tmusico/NLog,hubo0831/NLog,BrandonLegault/NLog,AqlaSolutions/NLog-Unity3D,thomkinson/NLog,AqlaSolutions/NLog-Unity3D,RichiCoder1/NLog,UgurAldanmaz/NLog,mikkelxn/NLog,Niklas-Peter/NLog,MartinTherriault/NLog,BrandonLegault/NLog,tetrodoxin/NLog,fringebits/NLog,ajayanandgit/NLog,blair55/NLog,MoaidHathot/NLog,blair55/NLog,NLog/NLog,bjornbouetsmith/NLog,mikkelxn/NLog,blair55/NLog,mikkelxn/NLog,ilya-g/NLog,mikkelxn/NLog,vbfox/NLog,AqlaSolutions/NLog-Unity3D,thomkinson/NLog,fringebits/NLog,nazim9214/NLog,czema/NLog,pwelter34/NLog,zbrad/NLog,vladikk/NLog,bryjamus/NLog,304NotModified/NLog,rajk987/NLog,hubo0831/NLog,ie-zero/NLog,BrandonLegault/NLog,luigiberrettini/NLog,breyed/NLog,blair55/NLog,vladikk/NLog,sean-gilliam/NLog,bhaeussermann/NLog,fringebits/NLog,bjornbouetsmith/NLog,luigiberrettini/NLog,matteobruni/NLog,thomkinson/NLog,czema/NLog,ie-zero/NLog,rajeshgande/NLog,ilya-g/NLog,campbeb/NLog,littlesmilelove/NLog,blair55/NLog,vladikk/NLog,RRUZ/NLog,czema/NLog,ArsenShnurkov/NLog,michaeljbaird/NLog,bhaeussermann/NLog,zbrad/NLog