tails@ email contact OpenPGP key expires on 2018-10-01

As our test suite says:

The following key(s) will not be valid in 3 months: 09F6BC8FEEC9D8EE005DBAA41D2975EDF93E735F, C3948FE7B604C6114E294DDFD843C2F5E89382EB.

Feature Branch: web/15711-update-email-key

Original created by @intrigeri on 15711 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information