spring-cloud-azure-starter-keyvault_4.15.0

Added a step to validate rest api spec location before release (#38332)

* Added a step to validate rest api spec location before release

* Correct the artifactLocation parameter value

* Update archetype-java-release.yml

Added comment for the step.

(cherry picked from commit d1dd3139e185acf332e3a93aa53c5df3c464c145)