ci: bump-minor-pre-major in the config file (#4479)
ci: bump-minor-pre-major in the config file (#4479)

As per @chingor13  and https://github.com/googleapis/release-please/blob/main/docs/manifest-releaser.md#configfile, the option is "bump-minor-pre-major".

Fixes https://github.com/googleapis/release-please/issues/1462
googleapis/java-cloud-bom,googleapis/java-cloud-bom,googleapis/java-cloud-bom,googleapis/java-cloud-bom