[cloud-spring-cloud-gcp-kotlin]: Curl command resulting in error

[Totalbug92]

The command:

curl https://start.spring.io/starter.tgz \
  -d language=kotlin \
  -d bootVersion=2.4.0 \
  -d dependencies=web,data-jpa,integration,cloud-gcp-pubsub,thymeleaf \
  -d baseDir=registrations-codelab | tar -xzvf -

results in these error messages

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now