Add 'hide-this-item' field to defense post

- ADDED: +hide-this-item: true to the post's metadata, which will likely control the visibility of this item in listings or on the website. No content was removed.

Signed-off-by: Leonid Petrov <[email protected]>

Author: lenis2000

_posts/defenses/2025-04-14-Cossaboom-defense.md

@@ -6,6 +6,7 @@ comments: false
 categories: events defenses news
 published: true
 more-text: Abstract
+hide-this-item: true
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 **Catherine Cossaboom** will defend the Distinguished Major Thesis on **Tuesday, April 22** under the direction of advisor **Ken Ono**. The title is