Fix comment typo in PSA version of ssl_get_ecdh_params_from_cert()

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/library/ssl_tls12_server.c b/library/ssl_tls12_server.c
index c7870f2..36f8f16 100644
--- a/library/ssl_tls12_server.c
+++ b/library/ssl_tls12_server.c
@@ -2893,7 +2893,7 @@
 
         psa_reset_key_attributes( &key_attributes );
 
-        /* Key should no be destroyed in the TLS library */
+        /* Key should not be destroyed in the TLS library */
         ssl->handshake->ecdh_psa_shared_key = 1;
 
         ret = 0;