Add newline to ChangeLog entry

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/ChangeLog.d/replace-close-with-mbedtls_net_close.txt b/ChangeLog.d/replace-close-with-mbedtls_net_close.txt
index 80cea67..213cf55 100644
--- a/ChangeLog.d/replace-close-with-mbedtls_net_close.txt
+++ b/ChangeLog.d/replace-close-with-mbedtls_net_close.txt
@@ -1,4 +1,4 @@
 Bugfix
    * Use 'mbedtls_net_close' instead of 'close' in 'mbedtls_net_bind'
      and 'mbedtls_net_connect' to prevent possible double close fd
-     problems. Fixes #9711.
\ No newline at end of file
+     problems. Fixes #9711.