dev: Use latest cozy-app-dev docker image version (#1873)
dev: Use latest cozy-app-dev docker image version (#1873)

This is needed to get the latest cozy-stack version including the the
new document revision in `referenced_by` additions response.
Without this update, our `RemoteCozy.addReferencedBy()` method does
not work and fails tests.
cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop