chore: update lighthouse to latest unstable version in sim tests #20982

Job	Run time
Build	2m 15s
Build	2m 10s
Deneb sim tests	0s
Deneb sim tests	6m 39s
Endpoint sim tests	0s
Endpoint sim tests	4m 1s
Eth backup provider sim tests	0s
Eth backup provider sim tests	8m 21s
Mixed clients sim tests	0s
Mixed clients sim tests	4m 35s
Multifork sim test	0s
Multifork sim test	5m 21s
	33m 22s

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