changelog: Addressed review comments

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
diff --git a/ChangeLog b/ChangeLog
index 9cffd5d..bb6e006 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -489,8 +489,7 @@
    * PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH and PSA_ALG_AEAD_WITH_TAG_LENGTH
      have been renamed, and the old names deprecated.
    * Signed magnitude and one's complement implementations for signed integers are
-     are now officially not supported. Two's Complement is the only supported
-     implementation going forward.
+     not supported. Two's complement is the only supported implementation.
 
 Features
    * The PSA crypto subsystem can now use HMAC_DRBG instead of CTR_DRBG.