Slight change in roadmap excerpt

* The roadmap will continue after 2020 and we will annouce our follow-up
goals at that time.
8 jobs for 167-roadmap-excerpt-is-wrong in 4 minutes and 45 seconds (queued for 10 seconds)
Status Name Job ID Coverage
  Build
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passed build:production #131110

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passed build:production:review-apps #131109

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passed build:production:subpath #131108

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  Test
passed test:htmlproofer #131111

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passed test:htmlproofer:subpath #131112

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  Review
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review-apps

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passed stop_review #131114
review-apps manual

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