primefield: bump crypto-bigint to v0.7.0-rc.6 (#1419)

Author: tarcieri

primefield/Cargo.toml

@@ -14,7 +14,7 @@ edition = "2024"
 rust-version = "1.85"
 
 [dependencies]
-bigint = { package = "crypto-bigint", version = "0.7.0-rc.4", default-features = false, features = ["hybrid-array"] }
+bigint = { package = "crypto-bigint", version = "0.7.0-rc.6", default-features = false, features = ["hybrid-array"] }
 ff = { version = "=0.14.0-pre.0", default-features = false }
 subtle = { version = "2.6", default-features = false }
 rand_core = { version = "0.9", default-features = false }