Updates hydra: 8464844 Deploy: check also for OpenPGP keys

diff --git a/hydra b/hydra
index 7cab259815680f7a61218e3305d40b4fbad519a0..8464844610b851ca7477b05f71c42890fcc43599 160000 (submodule)
--- a/hydra
+++ b/hydra
@@ -1 +1 @@
-Subproject commit 7cab259815680f7a61218e3305d40b4fbad519a0
+Subproject commit 8464844610b851ca7477b05f71c42890fcc43599