Fix 'Duplication of key "spring" in mapping' issue in src\main\resources\application.yml

[CodeFactor](https://www.codefactor.io/repository/github/api-collab/api-collab-server/overview/master) found an issue: Duplication of key "spring" in mapping

It's currently on:
[src\main\resources\application.yml:26
](https://www.codefactor.io/repository/github/api-collab/api-collab-server/source/master/src/main/resources/application.yml#L26)