Polish public demo configuration docs

Author: sl5-guy

README.md

@@ -11,7 +11,7 @@ cargo build --release
 ```
 
 The end-to-end demo, sidecar, TPM setup, mock services, and registry helper
-scripts live in the split demo repository. The demo pins a gateway image such as
+scripts live in the [split demo repository](https://github.com/sl5taskforce/agent-gateway-demo). The demo pins a gateway image such as
 `ghcr.io/sl5taskforce/agent-gateway:main` and does not require this source checkout.
 
 ## Configuration

config.example.toml

@@ -5,7 +5,7 @@ tls_key_path = "certs/server-key.pem"
 
 [observability]
 log_level = "info"
-otlp_endpoint = "http://localhost:4317"
+# otlp_endpoint = "http://localhost:4317"
 [policy]
 # Custom extension OID to extract from client certs.
 client_ext_oid = "1.3.6.1.4.1.57264.1.1"