Issue #3209096: Bump core version to 8.9 in info.yml file

In #3167443 the core version requirement got updated in the composer.json of Group, would be good to have that reflected in the info.yml file as well to have it consistent and make sure it shows the correct requirement on the module page in the release.

group.info.yml

@@ -2,7 +2,7 @@ name: 'Group'
 description: 'Allows you to group users, content and other entities'
 package: 'Group'
 type: 'module'
-core_version_requirement: ^8.8 || ^9
+core_version_requirement: ^8.9 || ^9
 configure: 'group.settings'
 dependencies:
   - 'drupal:options'