chore: Typo in oracles how to #15556

Job	Run time
build-nargo	2m 21s
build-noirc-abi	1m 39s
build-acvm-js	1m 37s
build-noir-wasm	3m 57s
ACVM JS (Browser)	1m 30s
ACVM JS (Node.js)	47s
noirc_abi	1m 18s
noir_codegen	1m 4s
Example scripts	17s
Noir JS	1m 1s
Check external repo - ${{ matrix.project.repo }}	0s
noir_wasm	1m 32s
Integration Tests (Browser)	2m 1s
Integration Tests (Node)	2m 19s
End	1s
	21m 24s

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