chore: syntax fix #1570

Job	Run time
set_sites	44s
lint_theme	41s
test_phpunit	1m 28s
test_new_site	12m 39s
test_existing_site (artexhibitions)	6m 15s
test_existing_site (buddhiststudies)	58s
test_existing_site (english)	5m 17s
test_existing_site (gavin_wright__humsci)	5m 11s
test_existing_site (gus_humsci)	5m 54s
test_existing_site (hs_fps)	5m 31s
test_existing_site (philit)	8m 12s
test_existing_site (planning_humsci)	5m 37s
test_existing_site (politicalscience)	8m 54s
test_existing_site (womensleadership)	6m 35s
deploy_branch	0s
	1h 13m 56s

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