Fixed typo in the generated documentation with custom routers
diff --git a/keepalived/meta/sphinx.yml b/keepalived/meta/sphinx.yml
index 743acf5..c7e43d5 100644
--- a/keepalived/meta/sphinx.yml
+++ b/keepalived/meta/sphinx.yml
@@ -7,6 +7,6 @@
       name: cluster
       param:
         {%- for instance_name, instance in cluster.instance.iteritems() %}
-        router {{ router_name }}:
+        router {{ instance_name }}:
           {{ instance.address }} at {{ instance.interface }}, priority {{ instance.priority }} of router {{ instance.virtual_router_id }}
         {%- endfor %}