Bump actions/cache from 3 to 4 #700

Job	Run time
Check cargo fmt	40s
cargo check	6m 34s
build with wasm-pack	1m 57s
cargo test (mac)	20m 46s
Verify MSRV	6m 15s
Verify Vendored Code	49s
cargo test (win64)	3h 13m 50s
cargo doc	3m 3s
Run sqllogictest with Postgres runner	3m 11s
check Cargo.toml formatting	1m 17s
clippy	2m 5s
cargo test hash collisions (amd64)	8m 37s
check configs.md is up-to-date	2m 8s
cargo test (amd64)	9m 4s
cargo test datafusion-cli (amd64)	2m 54s
cargo test doc (amd64)	9m 20s
cargo examples (amd64)	6m 15s
cargo test pyarrow (amd64)	2m 16s
verify benchmark results (amd64)	9m 38s
	4h 50m 39s

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