Update the descriptions of SANs

All of them are listed, so the previous description was wrong.

Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/include/mbedtls/x509_csr.h b/include/mbedtls/x509_csr.h
index f3f9e13..76e0238 100644
--- a/include/mbedtls/x509_csr.h
+++ b/include/mbedtls/x509_csr.h
@@ -60,7 +60,7 @@
 
     unsigned int key_usage;     /**< Optional key usage extension value: See the values in x509.h */
     unsigned char ns_cert_type; /**< Optional Netscape certificate type extension value: See the values in x509.h */
-    mbedtls_x509_sequence subject_alt_names;    /**< Optional list of raw entries of Subject Alternative Names extension (currently only dNSName and OtherName are listed). */
+    mbedtls_x509_sequence subject_alt_names; /**< Optional list of raw entries of Subject Alternative Names extension. These can be later parsed by mbedtls_x509_parse_subject_alt_name. */
 
     int MBEDTLS_PRIVATE(ext_types);              /**< Bit string containing detected and parsed extensions */