message: docs(readme): Fix grammar issue
diff: @@ -5,7 +5,7 @@ itk.js
  Provides general scientific image IO capability and bridges
  [ITK](https://itk.org) code running in an
  -JavaScript [asm.js](http://asmjs.org/) or [WebAssembly](http://webassembly.org/)
  +[asm.js](http://asmjs.org/) or [WebAssembly](http://webassembly.org/)
  runtime environment.
  Supported file formats
  