fix(docs): link to Go package

Author: h2non

README.md

@@ -2,7 +2,7 @@
 
 Small and dependency free [Python](http://python.org) package to infer file type and MIME type checking the [magic numbers](https://en.wikipedia.org/wiki/Magic_number_(programming)#Magic_numbers_in_files) signature of a file or buffer.
 
-This is a Python port from [filetype](https://github.com/h2non/) Go package. 
+This is a Python port from [filetype](https://github.com/h2non/filetype) Go package. 
 Works in Python `+3`.
 
 ## Features