Update dependency hydrogen to v0.5.1-7

requirements.yml

@@ -36,7 +36,7 @@
   version: v13.0.2-1
   name: grafana
 - src: git+https://github.com/mother-of-all-self-hosting/ansible-role-hydrogen.git
-  version: v0.5.1-5
+  version: v0.5.1-7
   name: hydrogen
 - src: git+https://github.com/mother-of-all-self-hosting/ansible-role-jitsi.git
   version: v11146-2-0