Motivation: Sometimes the meta data title tag is different from the h1-tag (SEO)

AT:

• if only the title tag is set, then title tag and h1-tag are equal
• example (like all sites at the moment)
  —
  title: 'BPMN 2.0 Examples, Patterns and Best Practises'
  subTitle: 'Lots of best practises, examples and patterns from our real life experience with BPMN'
  layout: 'navigated-docs'
  part: 'guides/bpmn/bpmn20-examples/chapters'

searchable: true
—

• it should be possible to define an h1-tag that differs from title tag
• example (does not be that specific tag)
  —
  title: 'BPMN 2.0 Examples, Patterns and Best Practises'
  h1: 'BPMN 2.0 Examples'
  subTitle: 'Lots of best practises, examples and patterns from our real life experience with BPMN'
  layout: 'navigated-docs'
  part: 'guides/bpmn/bpmn20-examples/chapters'

searchable: true
—