Include config.sample.json in dist tarball
Include config.sample.json in dist tarball

Fixes https://github.com/vector-im/vector-web/issues/2607

vector-im/riot-web,vector-im/vector-web,vector-im/riot-web,martindale/vector,vector-im/riot-web,vector-im/vector-web,vector-im/vector-web,martindale/vector,vector-im/vector-web,vector-im/riot-web,vector-im/riot-web,vector-im/riot-web,vector-im/vector-web