Spring Changelog generation fails as the milestone on GitHub for a release does not contain a .RELEASE suffix

We need to update that script to strip the .RELEASE prefix if it is present

See https://ci.spring.io/teams/spring-framework/pipelines/spring-framework-5.2.x/jobs/create-github-release/builds/1#L6024f3e9:45 for a failure.

Comment From: spring-projects-issues

Fixed via 30655555bdab0d6a402387e70e044c92f6b28ed9