Update the apt cache when the repo changes.

tasks/postgresql_org_repo.yml

@@ -30,6 +30,11 @@
         signed_by: "{{ postgresql_deb_repo_key }}"
         state: present
         enabled: true
+      register: postgresql_org_repo
+    - name: postgresql_org_repo | Update the apt cache
+      ansible.builtin.apt:
+        update_cache: yes
+      when: postgresql_org_repo is changed
 
 - name: postgresql_org_repo | Manage the EL repository
   when: