Adding missing NOTE delimiter

Author: sberyozkin

_posts/2025-04-28-secure-mcp-sse-server.adoc

@@ -301,6 +301,7 @@ with the following two properties instead:
 %prod.quarkus.oidc.login.credentials.client-secret.method=post
 %prod.quarkus.oidc.login.credentials.client-secret.value=${github.client.secret}
 ----
+====
 
 [[mcp-inspector]]
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