docs: add missing `lsp-bufls` to list #5420

Job	Run time
test (ubuntu-latest, 27.2, false)	2m 6s
test (ubuntu-latest, 28.2, false)	2m 36s
test (ubuntu-latest, 29.4, false)	2m 26s
test (macos-latest, 28.2, false)	3m 36s
test (macos-latest, 29.4, false)	3m 44s
test (windows-latest, 27.2, false)	3m 5s
test (windows-latest, 28.2, false)	3m 41s
test (windows-latest, 29.4, false)	3m 24s
test (ubuntu-latest, snapshot, true)	1m 23s
test (macos-latest, snapshot, true)	3m 3s
test (windows-latest, snapshot, true)	4m 45s
	33m 49s

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