Upgrade exim-relay (v4.98-r0-4-2 -> v4.98-r0-4-3)

requirements.yml

@@ -19,7 +19,7 @@
   version: v2.2.7-4
   name: etherpad
 - src: git+https://github.com/mother-of-all-self-hosting/ansible-role-exim-relay.git
-  version: v4.98-r0-4-2
+  version: v4.98-r0-4-3
   name: exim_relay
 - src: git+https://github.com/mother-of-all-self-hosting/ansible-role-grafana.git
   version: v11.5.2-0