docs: fix typo related to reporters #5947

Job	Run time
lint	2m 37s
test (ubuntu-latest, 16)	16m 11s
test (ubuntu-latest, 18)	13m 12s
test (macos-latest, 18)	21m 13s
test (windows-latest, 18)	23m 7s
test-browser (chrome, chromium)	6m 46s
test-browser (firefox, firefox)	5m 36s
test-browser (edge, webkit)	7m 18s
test-browser-safari	12m 6s
test-browser-windows (chrome, chromium)	10m 35s
test-browser-windows (edge, webkit)	11m 49s
test-ui	2m 50s
typecheck	4m 13s
	2h 17m 33s

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