docs(readme): removed a duplicated word (#457)

Author: C0ZEN

README.md

@@ -63,7 +63,7 @@ Use either `NPM_TOKEN` for token authentication or `NPM_USERNAME`, `NPM_PASSWORD
 |--------------|---------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------|
 | `npmPublish` | Whether to publish the `npm` package to the registry. If `false` the `package.json` version will still be updated.  | `false` if the `package.json` [private](https://docs.npmjs.com/files/package.json#private) property is `true`, `true` otherwise. |
 | `pkgRoot`    | Directory path to publish.                                                                                          | `.`                                                                                                                              |
-| `tarballDir` | Directory path in which to write the the package tarball. If `false` the tarball is not be kept on the file system. | `false`                                                                                                                          |
+| `tarballDir` | Directory path in which to write the package tarball. If `false` the tarball is not be kept on the file system. | `false`                                                                                                                          |
 
 **Note**: The `pkgRoot` directory must contain a `package.json`. The version will be updated only in the `package.json` and `npm-shrinkwrap.json` within the `pkgRoot` directory.