Mention ociupdate in the README #1529

Job	Run time
matrix-prep-os	1s
matrix-prep-bazelversion	3s
test (ubuntu-latest, 7.1.1, ., true)	5m 34s
test (ubuntu-latest, 7.1.1, ., false)	2m 13s
test (ubuntu-latest, 7.1.1, e2e/wasm, false)	4m 13s
test (ubuntu-latest, 7.1.1, e2e/smoke, true)	15s
test (ubuntu-latest, 7.1.1, e2e/smoke, false)	2m 27s
test (ubuntu-latest, 7.1.1, e2e/assertion, true)	4m 27s
test (ubuntu-latest, 6.4.0, ., true)	2m 44s
test (ubuntu-latest, 6.4.0, ., false)	5m 48s
test (ubuntu-latest, 6.4.0, e2e/wasm, false)	2m 58s
test (ubuntu-latest, 6.4.0, e2e/smoke, true)	16s
test (ubuntu-latest, 6.4.0, e2e/smoke, false)	2m 27s
test (ubuntu-latest, 6.4.0, e2e/assertion, true)	4m 26s
	37m 52s

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