build(deps): update polars-core requirement from 0.46 to 0.50

Updates the requirements on [polars-core](https://github.com/pola-rs/polars) to permit the latest version.
- [Release notes](https://github.com/pola-rs/polars/releases)
- [Commits](pola-rs/polars@rs-0.46.0...rs-0.50.0)

---
updated-dependencies:
- dependency-name: polars-core
  dependency-version: 0.50.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

ggetrs-string/Cargo.toml

@@ -16,7 +16,7 @@ bon = { workspace = true }
 clap = { workspace = true }
 reqwest = { workspace = true }
 serde_json = { workspace = true }
-polars-core = { version = "0.46", default-features = false }
+polars-core = { version = "0.50", default-features = false }
 polars-io = { version = "0.46", default-features = false, features = [
     "json",
     "csv",