chore(ci): make sure apt index is not stale before installing valgrind #437

Job	Run time
List examples	3s
check	1m 32s
with-typescript-cjs on Node 16	1m 49s
with-typescript-simple-cjs on Node 16	1m 55s
with-typescript-simple-esm on Node 16	1m 53s
with-typescript-esm on Node 16	1m 53s
with-javascript-cjs on Node 16	1m 37s
with-javascript-esm on Node 16	1m 58s
with-typescript-cjs on Node 18	1m 45s
with-typescript-simple-cjs on Node 18	2m 6s
with-typescript-simple-esm on Node 18	1m 56s
with-typescript-esm on Node 18	2m 24s
with-javascript-cjs on Node 18	2m 14s
with-javascript-esm on Node 18	1m 59s
with-typescript-cjs on Node 20.5.1	2m 18s
with-typescript-simple-cjs on Node 20.5.1	1m 56s
with-typescript-simple-esm on Node 20.5.1	1m 54s
with-typescript-esm on Node 20.5.1	1m 49s
with-javascript-cjs on Node 20.5.1	1m 41s
with-javascript-esm on Node 20.5.1	1m 45s
	36m 27s

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