Fix typo in LICENSE (#660)

LICENSE

@@ -118,7 +118,7 @@ and non-infringement.
 SoundTouch audio processing library (SoundTouch.cs)
 =================================================================================================
 File SoundTouch.cs was modified to include comments, remove notices and set a more 
-concise namespace. The file was supplied to the auther as an enhancement and now are part of the
+concise namespace. The file was supplied to the author as an enhancement and now are part of the
 wrapper offered in the SoundTouch website.
 
 Copyright (c) Olli Parviainen
@@ -608,4 +608,4 @@ NonCommercial — You may not use the material for commercial purposes.
 ShareAlike — If you remix, transform, or build upon the material, you must distribute your 
 contributions under the same license as the original.
 
-Please see the full license here: https://creativecommons.org/licenses/by-nc-sa/3.0/legalcode
+Please see the full license here: https://creativecommons.org/licenses/by-nc-sa/3.0/legalcode