change title on architecture.md.

Author: yugo-ibuki

content/ja/docs/demo/architecture.md

@@ -1,5 +1,5 @@
 ---
-title: デモアーキテクチャ
+title: デモのアーキテクチャ
 linkTitle: アーキテクチャ
 aliases: [current_architecture]
 body_class: otel-mermaid-max-width