Merge branch 'update_esl_demo' into 'master'

Updated the description of the ESL Demo module

See merge request !224
4 jobs for master in 1 minute and 53 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
passed #12662
orphans

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passed #12663
pages

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passed #12661
spelling

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  Deploy
passed pages:deploy

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