chore: clarify Field use #10989

Job	Run time
build-acvm-js	1m 35s
build-nargo	2m 47s
build-noirc-abi	1m 27s
build-noir-wasm	4m 24s
noirc_abi	1m 32s
ACVM JS (Browser)	1m 12s
ACVM JS (Node.js)	43s
Check external repo - zac-williamson/noir-edwards	11s
Noir JS	1m 13s
noir_codegen	1m 13s
Example scripts	19s
Integration Tests (Node)	2m 15s
noir_wasm	2m 3s
Integration Tests (Browser)	1m 50s
End	1s
	22m 45s

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