Fix typos in comments

Signed-off-by: Max Fillinger <maximilian.fillinger@foxcrypto.com>
diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index d12d447..27a674f 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -560,7 +560,7 @@
     int reproducible;           /* make communication reproducible          */
     int skip_close_notify;      /* skip sending the close_notify alert      */
     const char *exp_label;      /* label to input into mbedtls_ssl_export_keying_material() */
-    int exp_len;                /* Lenght of key to export using mbedtls_ssl_export_keying_material() */
+    int exp_len;                /* Length of key to export using mbedtls_ssl_export_keying_material() */
 #if defined(MBEDTLS_SSL_EARLY_DATA)
     int early_data;             /* early data enablement flag               */
 #endif