fix: ignore nested KaTeX tables for line highlights (fix #2559) #2294

Job	Run time
pack	41s
test (ubuntu-latest, npm, true)	2m 9s
test (ubuntu-latest, pnpm, false)	1m 41s
test (windows-latest, npm, false)	6m 37s
test (windows-latest, pnpm, false)	6m 15s
test (windows-latest, pnpm, true)	4m 35s
test (ubuntu-latest, pnpm, true)	1m 38s
test (windows-latest, npm, true)	7m 56s
test (ubuntu-latest, npm, false)	2m 2s
	33m 34s

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