Update admin-api.adoc

Author: JakeSCahill

modules/terms/partials/admin-api.adoc

@@ -4,7 +4,7 @@
 :category: Redpanda features
 
 ifndef::env-cloud[]
-For more information about using this API with Self-Managed Redpanda, see link:/api/doc/admin-api[].
+For more information about using this API with Self-Managed Redpanda, see link:/api/doc/admin[].
 endif::[]
 
 Note: The Redpanda Admin API is different from the https://kafka.apache.org/documentation/#adminapi[Kafka Admin API].