chore: update youtube link in readme (#171) #591

Job	Run time
zksync-airbender-build (13.0.0-devel-ubuntu24.04, zksmith)	1m 42s
zksync-airbender-build (12.9.1-devel-ubuntu22.04, zksmith)	1m 45s
zksync-airbender-test	-1s
	3m 26s

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