Use HTTPS URL.

wiki/src/contribute/release_process/tor-browser.mdwn

@@ -15,7 +15,7 @@ config/chroot_local-includes/usr/share/tails/tbb-sha256sums.txt]].
 
 Once released officially, Tor Browser tarballs can be found in
 a [permanent (?)
-location](http://archive.torproject.org/tor-package-archive/torbrowser/).
+location](https://archive.torproject.org/tor-package-archive/torbrowser/).
 However, when upgrading Tor Browser for an imminent Tails release, we
 generally have to use Tor Browser tarballs that are under QA and not
 officially released yet. So, we have to retrieve them from another,