Fix some typos.

src/lib/types.h

@@ -439,7 +439,7 @@ class SecurityContext;
 }
 
 typedef struct rnp_keygen_crypto_params_t {
- // Asymmteric algorithm that user requesed key for
+ // Asymmetric algorithm that user requested key for
  pgp_pubkey_alg_t key_alg;
  // Hash to be used for key signature
  pgp_hash_alg_t hash_alg;