Fix nested list expansion in JSON-LD #2638

Job	Run time
extra-tasks (gha:flake8, 3.8)	43s
validate (3.8, ubuntu-latest)	1m 19s
validate (3.8, macos-latest)	1m 46s
validate (3.8, windows-latest)	1m 37s
validate (3.9, ubuntu-latest)	57s
validate (3.9, macos-latest)	2m 13s
validate (3.9, windows-latest)	2m 40s
validate (3.10, ubuntu-latest)	1m 15s
validate (3.10, macos-latest)	1m 58s
validate (3.10, windows-latest)	1m 46s
validate (3.11, ubuntu-latest)	1m 44s
validate (3.11, macos-latest)	1m 53s
validate (3.11, windows-latest)	1m 47s
validate (3.8, ubuntu-latest, -min, true, -min)	1m 15s
finish	0s
	22m 53s

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