chore: ignore broken clippy::needless_return lint in latest nightlies

Our problem was already reported and is being tracked upstream at
rust-lang/rust-clippy#13458.

Cargo.toml

@@ -36,6 +36,8 @@ unsafe_op_in_unsafe_fn = "deny"
 #pedantic = "warn" # TODO too pedantic for now, fix the warnings and re-enable this sooner than later
 cargo = { level = "warn", priority = -1 }
 multiple_crate_versions = "allow" # Introduces much noise, not better than cargo deny
+# Workaround for a recent nightly Clippy regression: https://github.com/rust-lang/rust-clippy/issues/13458
+needless_return = "allow"
 
 [workspace.lints.rustdoc]
 invalid_html_tags = "deny"