CHANGELOG.md: Document fix to AC commands.

Signed-off-by: Philip Tricca <philip.b.tricca@intel.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3254b0a..1af097d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,8 @@
 - Changed TCTI macros to CamelCase (API break)
 - Changed TPMA_types to unsigned int with defines instead of bitfield structs (API/ABI break)
 - Changed Get/SetCmd/RspAuths to new parameter types (API/ABI break)
+- Fixed order of parameters in AC commands: Input command authorizations
+now come after the input handles, but still before the command parameters.
 
 ### Fixed
 - Updated invalid number of handles in TPM2_PolicyNvWritten and TPM2_TestParms