added changelog for embl-notifications (#1753)

* added changelog for embl-notifications

* fixed a typo
3 jobs for develop in 11 minutes and 14 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #714719
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build

00:08:53

 
  Deploy
passed #714721
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deploy-aws-dev

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passed #714720
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deploy-dev

00:02:21