Fix Maven version in application.yaml (Spring Boot 2.1.3)

Until recently we could use something like this to show the maven version and timestamp inside the /info actuator:
info:
  app:
    name: my-service
    version: @project.version@
    buildtime: @timestamp@
As we updated to Spring Boot 2.1.3 the application didn`t want to start up. The error message said the we couldn't use the @ delimiter. To fix this problem you need to do the following:

pom.xml

<properties>
   <resource.delimiter>^</resource.delimiter>
</properties>

application.yaml

# this info may be accessed via actuator
info:
  app:
    name: my-service
    version: ^project.version^
    buildtime: ^timestamp^