Add the opengraph image

Signed-off-by: Thib <thib@ergaster.org>

Author: thibaultamartin

content/blog/2026/05/2026-05-29-twim.md

@@ -5,7 +5,10 @@ path = "/blog/2026/05/29/this-week-in-matrix-2026-05-29"
 
 [taxonomies]
 author = ["Thib"]
-category = ["This Week in Matrix"]
+category = ["This Week in Matrix"]
+
+[extra]
+image = https://matrix.org/blog/img/2026-05-29-og.png
 +++
 
 ## Matrix Live S12E09 – Element Demos