upgrade ldes-consumer-manager when mu-python-template fixes needless warning when MODE is unset

[marc-portier]

See https://github.com/redpencilio/ldes-consumer-manager/issues/4

Which probably will result in a new release of that package, needing a follow-upchange in https://github.com/vlizBE/vocabserver-app/blob/741e45e6253f5d2e0803c38dd4913dfaad5eb337/docker-compose.yml#L149 to actually use that