Release process: avoid sudo timing out when generating IUKs.

... by running the whole script as root. The only side-effect I
noticed was that the resulting IUKs are owned by root.

wiki/src/contribute/release_process.mdwn

@@ -948,7 +948,7 @@ before starting the wrapper from `puppet-tails`:
        TAILS_REMOTE="$(git -C "${RELEASE_CHECKOUT?:}" remote get-url origin)"
        cd "${WORK_DIR?:}"
        git clone git@gitlab-ssh.tails.boum.org:tails/puppet-tails
-       sudo -l
+       sudo                                                                   \
        time                                                                   \
        ./puppet-tails/files/jenkins/slaves/isobuilders/wrap_tails_create_iuks \
            --tails-git-remote "file://${RELEASE_CHECKOUT?:}/.git"             \