add changelog entry for httokendecode error output

Author: DrDaveD

htgettoken.spec

@@ -125,6 +125,8 @@ rm -rf $RPM_BUILD_ROOT
 
 %changelog
 # - Make --showbearerurl work properly in combination with --nobearertoken
+# - Change the httokendecode error message for a missing token file to
+#   stderr instead of stdin.
 
 * Wed Oct 12 2022 Dave Dykstra <dwd@fnal.gov> 1.16-1
 - Fix httokendecode -H functionality to only attempt to convert a parsed word