Fix typo in deprecation notice

See: https://en.oxforddictionaries.com/definition/deprecate
4 jobs for typo
latest
Status Job ID Name Coverage
  Lint
failed Lint #114718
docker

 
  Coverage
skipped Coverage #114719
docker
 
  Unittest
skipped Unittest27 #114720
docker
skipped Unittest35 #114721
docker
 
Name Stage Failure
failed
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