build(deps): update dashmap requirement from 5.5.0 to 6.0.0 #2617

Job	Run time
Check cargo fmt	38s
build with wasm-pack	2m 5s
cargo check	3m 32s
cargo test (macos)	17m 30s
cargo test (macos-aarch64)	18s
Verify MSRV (Min Supported Rust Version)	47s
Verify Vendored Code	44s
cargo test (win64)	33m 3s
cargo test (amd64)	0s
cargo doc	0s
cargo test datafusion-cli (amd64)	0s
cargo examples (amd64)	0s
Run sqllogictest with Postgres runner	0s
verify benchmark results (amd64)	0s
cargo test pyarrow (amd64)	0s
clippy	0s
cargo test hash collisions (amd64)	0s
check configs.md is up-to-date	0s
cargo test doc (amd64)	0s
check Cargo.toml formatting	0s
	58m 37s

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