Add paper title to Changelog

Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/ChangeLog.d/rsa-fix-priviliged-side-channel.txt b/ChangeLog.d/rsa-fix-priviliged-side-channel.txt
index d4ffa91..f112eae 100644
--- a/ChangeLog.d/rsa-fix-priviliged-side-channel.txt
+++ b/ChangeLog.d/rsa-fix-priviliged-side-channel.txt
@@ -4,5 +4,6 @@
      enclave) could recover an RSA private key after observing the victim
      performing a single private-key operation if the window size used for the
      exponentiation was 3 or smaller. Found and reported by Zili KOU,
-     Wenjian HE, Sharad Sinha, and Wei ZHANG.
+     Wenjian HE, Sharad Sinha, and Wei ZHANG. See "Cache Side-channel Attacks
+     and Defenses of the Sliding Window Algorithm in TEEs" - DATE 2023.