Add buildFuture to Hugo config to prevent timezone-related publish failures

Posts with KST dates (UTC+9) can appear as future-dated during
UTC-based CI builds, causing Hugo to silently exclude them.
Setting buildFuture: true ensures all dated posts are always built.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: serithemage

hugo.yaml

@@ -2,6 +2,7 @@ baseURL: "https://roboco.io"
 languageCode: "ko-kr"
 title: "ROBOCO"
 theme: "hello-friend-ng"
+buildFuture: true
 
 params:
   author: "ROBOCO"