Issue #2565791 by mikeryan, subhojit777, quietone, phenaproxima: Fix migration labels

...modules/action/migration_templates/d6_action_settings.yml

...les/aggregator/migration_templates/d6_aggregator_feed.yml

...les/aggregator/migration_templates/d6_aggregator_item.yml

...aggregator/migration_templates/d6_aggregator_settings.yml

...aggregator/migration_templates/d7_aggregator_settings.yml

core/modules/ban/migration_templates/d7_blocked_ips.yml

core/modules/block/migration_templates/d6_block.yml

...ntent/migration_templates/d6_block_content_body_field.yml

...ock_content/migration_templates/d6_block_content_type.yml

...les/block_content/migration_templates/d6_custom_block.yml

core/modules/book/migration_templates/d6_book.yml

core/modules/book/migration_templates/d6_book_settings.yml

core/modules/comment/migration_templates/d6_comment.yml

...comment/migration_templates/d6_comment_entity_display.yml

...nt/migration_templates/d6_comment_entity_form_display.yml

...tion_templates/d6_comment_entity_form_display_subject.yml

.../modules/comment/migration_templates/d6_comment_field.yml

...comment/migration_templates/d6_comment_field_instance.yml

core/modules/comment/migration_templates/d6_comment_type.yml

core/modules/comment/migration_templates/d7_comment.yml