In sign-nightly, run static-update-component without torsocks

We run the sign-nightly script with torsocks in order to be able to download nightly builds from an .onion address. At the end, we need to run static-update-component nightlies.tbb.torproject.org to sync files to the mirrors, however static-update-component doesn't work correctly with torsocks. So we should disable torsocks before running static-update-component, probably with something like . torsocks off.