fix: Update key exchange algos

policy/policy.txt

@@ -19,7 +19,7 @@ dh_modulus_size_diffie-hellman-group-exchange-sha256 = 4096
 host keys = ssh-ed25519, rsa-sha2-512, rsa-sha2-256, rsa-sha2-512, rsa-sha2-256
 
 # The key exchange algorithms that must match exactly (order matters).
-key exchanges = curve25519-sha256, [email protected], diffie-hellman-group-exchange-sha256, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group14-sha256, [email protected]
+key exchanges = curve25519-sha256, [email protected], diffie-hellman-group-exchange-sha256, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group14-sha256, ext-info-s, [email protected]
 
 # The ciphers that must match exactly (order matters).
 ciphers = [email protected], aes128-ctr, aes192-ctr, aes256-ctr, [email protected], [email protected]