Update model.info.yml.twig

Remove the core 8 requirement, and removed the core_version_requirement for 8 as well.

Author: PetersRicardo

templates/module/model.info.yml.twig

@@ -2,8 +2,7 @@ name: {{ name }}
 type: module
 description: {{ description }}
 package: {{ package }}
-core: 8.x
-core_version_requirement: ^8 || ^9
+core_version_requirement: ^9
 {% if dependencies %}
 dependencies:
   {% for dependency in dependencies %}