Missing shared_cutouts in tutorial

[davide-f]

Describe the feature you'd like to see

In the tutorial config, we miss the run->shared_cutouts field

see:

pypsa-earth/config.tutorial.yaml

Line 37 in c1d4b99

run:

with respect to this:

pypsa-earth/config.default.yaml

Lines 27 to 31 in c1d4b99

	run:
	name: "" # use this to keep track of runs with different settings
	shared_cutouts: true # set to true to share the default cutout(s) across runs
	# Note: value false requires build_cutout to be enabled

This is a good first issue for anyone