add missing text in changelog

Author: jimmielin

doc/ChangeLog

@@ -103,7 +103,10 @@ tag:
 Summarize any changes to answers:
 Answer changes for all configurations using diffusion solver and Beljaars -or- TMS,
 due to change in order of operations in computing residual surface stress.
-Not all compsets
+Not all compsets change. CAM4 compsets are unaffected because they do not have orographic drag,
+so the change in adding zeros will not affect answers. "Q"/aquaplanet compsets did not see
+answer changes.
+
 
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