fix: metadata update use bytearray #6703

Job	Run time
cairofmt	5s
clippy	8m 53s
docs	13m 18s
dojo-core-test	20m 48s
dojo-spawn-and-move-example-test	16m 32s
ensure-wasm	8m 12s
dojo-world-bindings-check	7m 40s
ensure-windows	9m 29s
fmt	2m 11s
test	26m 2s
test-hurl	7m 2s
	2h 0m 12s

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