fix: clippy

Author: brech1

Diff for: src/identity.rs

@@ -182,7 +182,7 @@ impl Signature {
         let mut c_fr = Fr::from_le_bytes_mod_order(&c_fq.into_bigint().to_bytes_le());
 
         // Multiply challenge scalar by cofactor
-        c_fr = c_fr * Fr::from_be_bytes_mod_order(&[BabyJubjubConfig::COFACTOR[0] as u8]);
+        c_fr *= Fr::from_be_bytes_mod_order(&[BabyJubjubConfig::COFACTOR[0] as u8]);
 
         // s * generator
         let left = BabyJubjubConfig::GENERATOR.mul(self.s);