Fix typo

Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/ChangeLog.d/fix-Marvin-attack.txt b/ChangeLog.d/fix-Marvin-attack.txt
index f729304..017f7b1 100644
--- a/ChangeLog.d/fix-Marvin-attack.txt
+++ b/ChangeLog.d/fix-Marvin-attack.txt
@@ -1,6 +1,6 @@
 Security
    * Fix a timing side channel in RSA private operations. This side channel
      could be sufficient for a local attacker to recover the plaintext. It
-     requires the attecker to send a large number of messages for decryption.
+     requires the attacker to send a large number of messages for decryption.
      For details, see "Everlasting ROBOT: the Marvin Attack", Hubert Kario.
      Reported by Hubert Kario, Red Hat.