chore: update rust-argon2 crate to v2

crates/auth/Cargo.toml

@@ -17,7 +17,7 @@ sea_orm = ["dep:sea-orm"]
 test = []
 
 [dependencies]
-rust-argon2 = "0.8"
+rust-argon2 = "2"
 curve25519-dalek = "3"
 digest = "0.9"
 generic-array = "0.14"

crates/auth/src/opaque.rs

@@ -32,7 +32,6 @@ impl ArgonHasher {
         lanes: 1,
         mem_cost: 50 * 1024, // 50 MB, in KB
         secret: &[],
-        thread_mode: argon2::ThreadMode::Sequential,
         time_cost: 1,
         variant: argon2::Variant::Argon2id,
         version: argon2::Version::Version13,