[HR] Add announcement url to 3.0.0.Final and 4.0.0.Beta1

Author: DavideD

_data/projects/reactive/releases/3.0/3.0.0.Final.yml

@@ -1,3 +1,3 @@
 date: 2025-05-22
-announcement_url: 
+announcement_url: https://in.relation.to/2025/05/26/hibernate-reactive-3_0_0_Final/
 summary: Hibernate ORM 7.0.0.Final, Vert.x 4.5.15, Mutiny 2.9.0

_data/projects/reactive/releases/4.0/4.0.0.Beta1.yml

@@ -1,3 +1,3 @@
 date: 2025-05-22
-announcement_url: 
+announcement_url: https://in.relation.to/2025/05/26/hibernate-reactive-3_0_0_Final/
 summary: Hibernate ORM 7.0.0.Final, Vert.x 5.0.0, and Mutiny 2.9.0