Fix website dead links #8147

Job	Run time
scarb-metadata compatibility check	42s
check-website	9s
check-rust	3m 44s
build test linux x86-64	4m 0s
doc tests	3m 4s
build test windows x86-64	7m 47s
test linux x86-64 1/8	21m 41s
test linux x86-64 2/8	24m 0s
test linux x86-64 3/8	19m 45s
test linux x86-64 4/8	17m 38s
test linux x86-64 5/8	15m 54s
test linux x86-64 6/8	13m 16s
test linux x86-64 7/8	13m 45s
test linux x86-64 8/8	15m 17s
test windows x86-64 1/8	20m 11s
test windows x86-64 2/8	22m 6s
test windows x86-64 3/8	19m 26s
test windows x86-64 4/8	15m 22s
test windows x86-64 5/8	16m 18s
test windows x86-64 6/8	12m 47s
test windows x86-64 7/8	13m 1s
test windows x86-64 8/8	14m 46s
	4h 54m 39s

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