Update Rust crate lance-encoding to v6

Author: renovate[bot]

Cargo.lock

@@ -16,7 +16,7 @@ publish = false
 
 [dependencies]
 lance = { version = "4", default-features = false }
-lance-encoding = { version = "4" }
+lance-encoding = { version = "6" }
 
 anyhow = { workspace = true }
 arrow-cast = { version = "57" }