code-of-conduct/ を参照するよう修正

Co-authored-by: Daisuke Yamamura <[email protected]>

Author: kp54

code-of-conduct/index.html

@@ -13,8 +13,8 @@
     <meta name="twitter:card" content="summary_large_image" />
 
     <!-- Settings for web browsers (as minimum as possible) -->
-    <link rel='canonical' href='https://dojocon2025.coderdojo.jp/code-of-conduct' />
-    <link rel='shortlink' href='https://dojocon2025.coderdojo.jp/code-of-conduct' />
+    <link rel='canonical' href='https://dojocon2025.coderdojo.jp/code-of-conduct/' />
+    <link rel='shortlink' href='https://dojocon2025.coderdojo.jp/code-of-conduct/' />
     <link rel="manifest" href="/site.webmanifest">
     <link rel="icon" href="/img/favicon.ico"> <!-- 32×32 -->
     <link rel="apple-touch-icon" href="/img/apple-touch-icon.png"> <!-- 180×180 -->