Updates hydra: 8e531b5 Fix: docs: tpc: typo

diff --git a/hydra b/hydra
index 23c3049eb23a456d4e843d7d06b1c74a91196476..8e531b59f9285104b29147136d388b70d657a64f 160000 (submodule)
--- a/hydra
+++ b/hydra
@@ -1 +1 @@
-Subproject commit 23c3049eb23a456d4e843d7d06b1c74a91196476
+Subproject commit 8e531b59f9285104b29147136d388b70d657a64f