build(rust): update regex-syntax requirement from 0.7 to 0.8 (#11870)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

crates/polars-arrow/Cargo.toml

@@ -36,7 +36,7 @@ lexical-core = { workspace = true, optional = true }
 
 fallible-streaming-iterator = { workspace = true, optional = true }
 regex = { workspace = true, optional = true }
-regex-syntax = { version = "0.7", optional = true }
+regex-syntax = { version = "0.8", optional = true }
 streaming-iterator = { workspace = true }
 
 indexmap = { workspace = true, optional = true }