Update ChangeLog with dtls sample IPv6 change
@@ -13,6 +13,10 @@ API Changes
Therefore, mbedtls_platform_zeroize() is moved to the platform module to
facilitate testing and maintenance.
+Changes
+ * Change the dtls_client and dtls_server samples to work by default over
+ IPv6 and optionally by a build option over IPv4.
+
= mbed TLS 2.9.0 branch released 2018-04-30
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