Allow health listener resource to load (#15096)

* Allow health listener resource to load.

* changelog

* Update changelog.d/15096.bugfix

changelog.d/15096.bugfix

@@ -0,0 +1 @@
+Fix a bug introduced in Synapse 1.76 where workers would fail to start if the `health` listener was configured.

synapse/config/server.py

@@ -177,6 +177,7 @@ KNOWN_RESOURCES = {
     "client",
     "consent",
     "federation",
+    "health",
     "keys",
     "media",
     "metrics",