Quick update of ARCHITECTURE.md #5914

Job	Run time
scarb-metadata compatibility check	42s
build test linux x86-64	3m 7s
check-website	18s
build test windows x86-64	6m 11s
check-rust	3m 59s
doc tests	3m 2s
test linux x86-64 1/8	6m 18s
test linux x86-64 2/8	7m 51s
test linux x86-64 3/8	8m 4s
test linux x86-64 4/8	5m 47s
test linux x86-64 5/8	5m 32s
test linux x86-64 6/8	3m 59s
test linux x86-64 7/8	4m 26s
test linux x86-64 8/8	2m 46s
test windows x86-64 1/8	6m 20s
test windows x86-64 2/8	8m 38s
test windows x86-64 3/8	8m 13s
test windows x86-64 4/8	6m 48s
test windows x86-64 5/8	6m 16s
test windows x86-64 6/8	4m 49s
test windows x86-64 7/8	4m 59s
test windows x86-64 8/8	4m 2s
	1h 52m 7s

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