Updated Drupal to 8.6. This goes with the following updates because it's possible...

[yaffs-website] / web / core / profiles / demo_umami / config / install / rdf.mapping.taxonomy_term.tags.yml

langcode: en
status: true
dependencies:
  config:
    - taxonomy.vocabulary.tags
  module:
    - taxonomy
id: taxonomy_term.tags
targetEntityType: taxonomy_term
bundle: tags
types:
  - 'schema:Thing'
fieldMappings:
  name:
    properties:
      - 'schema:name'
  description:
    properties:
      - 'schema:description'