Update guide-changelog.md (#5127)
Update guide-changelog.md (#5127)

The changelog is displayed only if the repository contains a class which implements `ZIF_APACK_MANIFEST`, whose constructor initializes the current version in attribute `zif_apack_manifest~descriptor-version`.
sbcgua/abapGit,larshp/abapGit,larshp/abapGit,sbcgua/abapGit