Update admin route

enum_generator.routing.yml

 hc_enum_generator.generator.taxonomy:
-  path: '/hc-enum-generator/generator/taxonomy'
+  path: '/admin/structure/enum-generator/taxonomy'
   defaults:
     _title: 'Taxonomy generator'
     _form: 'Drupal\hc_enum_generator\Form\TaxonomyGeneratorForm'
   requirements:
     _permission: 'access enum generator'
+  options:
+    _admin_route: TRUE