Correct error in tuple example in ruff formatter docs #19716

Job	Run time
cargo fmt	16s
cargo test \| ubuntu-latest	5m 39s
cargo clippy	3m 2s
cargo test \| windows-latest	7m 23s
cargo fuzz	6m 19s
cargo test (wasm)	1m 43s
Determine changes	17s
test scripts	1m 12s
benchmarks	12m 54s
cargo udeps	3m 40s
mkdocs	2m 24s
pre-commit	1m 49s
python package	2m 40s
Formatter ecosystem and progress checks	4m 10s
ecosystem	0s
	53m 28s

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