README: fix some typos
README: fix some typos

aakselrod/lnd,ddustin/lnd,aakselrod/lnd,AndrewSamokhvalov/lnd,ddustin/lnd,AndrewSamokhvalov/lnd,LightningNetwork/lnd,bryanvu/lnd,bryanvu/lnd,LightningNetwork/lnd