chore(cli): improve tag description

There was some confusion whether a tag attaches to a single resource or
attaches to the resourcegroup and therefore every resource underneath
it.

Co-authored-by: Caden Marchese <cmarches@redhat.com>

Ref: https://redhat.atlassian.net/browse/ARO-27517

Author: komidore64

python/az/aro/azext_aro/_params.py

@@ -45,7 +45,8 @@ def load_arguments(self, _):
                    name_type,
                    help='Name of cluster.')
         c.argument('tags',
-                   tags_type)
+                   tags_type,
+                   help='Tags to be assigned to the openShiftCluster resource. ' + tags_type.settings.get('help', ''))
 
         c.argument('pull_secret',
                    help='Pull secret of cluster.',