Update documntation

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 9c3c2dd..2858353 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -1789,7 +1789,7 @@
 
 #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
 /*
- * Parse TLS 1.3 Signature Algorithm extension
+ * Parse TLS Signature Algorithm extension
  */
 int mbedtls_ssl_parse_sig_alg_ext( mbedtls_ssl_context *ssl,
                                    const unsigned char *buf,