Add comma omitted by merge

Author: danieljbruce

release-please-config.json

@@ -231,7 +231,7 @@
     "packages/google-cloud-auditmanager": {},
     "packages/google-maps-geocode": {},
     "packages/google-cloud-datacatalog-lineage-configmanagement": {},
-    "packages/google-developers-knowledge": {}
+    "packages/google-developers-knowledge": {},
     "packages/google-cloud-appoptimize": {},
     "packages/google-devicesandservices-health": {},
     "packages/google-cloud-databasecenter": {}