docs: TLS 1.3: Improve wording

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/docs/architecture/tls13-support.md b/docs/architecture/tls13-support.md
index eccc639..9e9aad3 100644
--- a/docs/architecture/tls13-support.md
+++ b/docs/architecture/tls13-support.md
@@ -183,8 +183,8 @@
 Prototype upstreaming status
 ----------------------------
 
-The following gives an hint of which parts of the TLS 1.3 prototype remain
-to be upstreamed:
+The following summarizes which parts of the TLS 1.3 prototype remain to be
+upstreamed:
 
 - Ephemeral only handshake on client side: client authentication,
   HelloRetryRequest support, version negotiation.