Fix redb version to the latest version that uses edition 2021

Author: rklaehn

Cargo.toml

@@ -58,7 +58,7 @@ quic-rpc = { version = "0.19", optional = true }
 quic-rpc-derive = { version = "0.19", optional = true }
 rand = "0.8"
 range-collections = "0.4.0"
-redb = { version = "2.2.0", optional = true }
+redb = { version = "=2.4", optional = true }
 reflink-copy = { version = "0.1.8", optional = true }
 self_cell = "1.0.1"
 serde = { version = "1", features = ["derive"] }