Add header image for blog article release 3.11.0 in ALL

docs/de/news/2025-07-05-release-3-11-0-with-numerous-improvements/README.md

@@ -8,6 +8,7 @@ category:
   - News
 tag:
   - Releases
+cover: /de/news/2025-07-05-release-3-11-0-with-numerous-improvements/ocelot-social-release-v3-11-0.jpg
 title: "Version 3.11.0 mit zahlreichen Verbesserungen"
 description: "Diese Version der ocelot.social-Software verbessert die Stabilität und Nutzung des Chats und behebt einige Fehler."
 ---

docs/en/news/2025-07-05-release-3-11-0-with-numerous-improvements/README.md

@@ -8,6 +8,7 @@ category:
   - News
 tag:
   - Releases
+cover: /de/news/2025-07-05-release-3-11-0-with-numerous-improvements/ocelot-social-release-v3-11-0.jpg
 title: "Version 3.11.0 with numerous improvements"
 description: "This version of the ocelot.social software improves the stability and usability of the chat and fixes several bugs."
 ---

docs/es/news/2025-07-05-release-3-11-0-with-numerous-improvements/README.md

@@ -8,6 +8,7 @@ category:
   - News
 tag:
   - Releases
+cover: /de/news/2025-07-05-release-3-11-0-with-numerous-improvements/ocelot-social-release-v3-11-0.jpg
 title: "Versión 3.11.0 con numerosas mejoras"
 description: "Esta versión del software ocelot.social mejora la estabilidad y el uso del chat y corrige algunos errores."
 ---

docs/fr/news/2025-07-05-release-3-11-0-with-numerous-improvements/README.md

@@ -8,6 +8,7 @@ category:
   - News
 tag:
   - Releases
+cover: /de/news/2025-07-05-release-3-11-0-with-numerous-improvements/ocelot-social-release-v3-11-0.jpg
 title: "Version 3.11.0 avec de nombreuses améliorations"
 description: "Cette version du logiciel ocelot.social améliore la stabilité et l’utilisation du chat et corrige quelques bugs."
 ---