CI is broken about kedro-starters

[astrojuanlu]

Root cause:

kedro-starters/pyspark-iris/{{ cookiecutter.repo_name }}/conf/base/catalog.yml

Lines 97 to 103 in 2d86c0f

	# This is an example how to use `MemoryDataSet` with Spark objects that aren't `DataFrame`'s.
	# In particular, the `assign` copy mode ensures that the `MemoryDataSet` will be assigned
	# the Spark object itself, not a deepcopy version of it, since deepcopy doesn't work with
	# Spark object generally.
	example_classifier:
	type: MemoryDataSet
	copy_mode: assign

and

https://github.com/kedro-org/kedro/blob/fd8162d5bf384ef666c01ef2c529d01fd9fa8354/kedro/io/core.py#L427-L431

[astrojuanlu]

In progress at kedro-org/kedro#2724

[astrojuanlu]

Test: gh-138