style: rustfmt import ordering after jackal -> voltic rename

The rename commit reordered use-statements without re-running rustfmt,
which failed cargo fmt --check in CI (the first gate) and masked
clippy/test/bench. Formatting only; no functional change.

Author: RyanJamesStewart

bench/main.rs

@@ -24,8 +24,8 @@ mod naive;
 #[path = "phi.rs"]
 mod phi;
 
-use voltic::OptionKind;
 use std::time::Instant;
+use voltic::OptionKind;
 
 const REPEATS: usize = 7;
 

bench/phi.rs

@@ -10,9 +10,9 @@
 //! arbitrary-precision Φ). "Max abs error" is the worst |Φ̂(x) − Φ_ref(x)| over
 //! those points — a fixed, reproducible measure, not a moving target.
 
-use voltic::norm;
 use std::simd::prelude::*;
 use std::time::Instant;
+use voltic::norm;
 
 /// (x, Φ(x)) — Φ correct to f64 precision (offline arbitrary-precision eval).
 #[rustfmt::skip]

tests/properties.rs

@@ -9,8 +9,8 @@
 //! below checks voltic against it. The round-trip and parity proptests need no
 //! Python and run on every `cargo test`.
 
-use voltic::{bs_price, implied_vol, OptionKind};
 use proptest::prelude::*;
+use voltic::{bs_price, implied_vol, OptionKind};
 
 /// A strategy producing a *well-conditioned* option: parameters in plausible
 /// ranges, then **filtered** to those whose Black-Scholes premium is