userid-validation: add hetzner

A new CLA from Hetzner has been accepted and uploaded to the google
drive

Change-Id: Ia7557e94ec794a1f7479b9df6c757f374dfbf2e6
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/jenkins/userid-validation b/jenkins/userid-validation
index a0b45e3..e426fde 100755
--- a/jenkins/userid-validation
+++ b/jenkins/userid-validation
@@ -72,6 +72,7 @@
         gagar-in/ci-authorized \
         google/ci-authorized \
         hcl/ci-authorized \
+        hetzner/ci-authorized \
         hp/ci-authorized \
         hpe/ci-authorized \
         ibm/ci-authorized \