Ensure SignatureAlgorithm::iter() works for ML-DSA

Author: ctz

rcgen/src/sign_algo.rs

@@ -84,6 +84,12 @@ impl SignatureAlgorithm {
 			#[cfg(feature = "aws_lc_rs")]
 			&ECDSA_P521_SHA512,
 			&ED25519,
+			#[cfg(all(feature = "aws_lc_rs_unstable", not(feature = "fips")))]
+			&ML_DSA_44,
+			#[cfg(all(feature = "aws_lc_rs_unstable", not(feature = "fips")))]
+			&ML_DSA_65,
+			#[cfg(all(feature = "aws_lc_rs_unstable", not(feature = "fips")))]
+			&ML_DSA_87,
 		];
 		ALGORITHMS.iter()
 	}