chore: Fix redb version to the latest version that uses edition 2021 #309

Job	Run time
Cross Build Only (x86_64-unknown-freebsd)	54s
Checking fmt	21s
Android Build Only (aarch64-linux-android)	1m 10s
Cross Test (i686-unknown-linux-gnu)	1m 32s
check_semver	1m 28s
Android Build Only (armv7-linux-androideabi)	1m 9s
cargo deny	29s
clippy_check	1m 33s
Checking docs	1m 10s
codespell	6s
Minimal Supported Rust Version	1m 0s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1m 43s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1m 3s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 27s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	2m 17s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1m 39s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	2m 13s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	2m 17s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	56s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	1m 25s
	25m 52s

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