fix typo #350

Job	Run time
cargo check	8m 20s
cargo test (win64)	1h 5m 34s
Check License Header	2m 13s
Check cargo fmt	46s
build with wasm-pack	3m 4s
cargo test (macos)	12m 50s
cargo test (macos-aarch64)	12m 55s
Verify MSRV (Min Supported Rust Version)	8m 54s
Verify Vendored Code	47s
cargo test datafusion-cli (amd64)	4m 0s
cargo examples (amd64)	14m 4s
check Cargo.toml formatting	3m 13s
cargo test hash collisions (amd64)	17m 21s
clippy	6m 4s
cargo doc	4m 42s
cargo test (amd64)	12m 0s
cargo test doc (amd64)	16m 47s
Run sqllogictest with Postgres runner	3m 49s
cargo test pyarrow (amd64)	2m 59s
verify benchmark results (amd64)	13m 24s
check configs.md and ***_functions.md is up-to-date	3m 25s
	3h 37m 11s

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