Update changelog with more info on the expected answer changes

doc/ChangeLog

@@ -1,7 +1,7 @@
 ===============================================================
 Tag name: ctsm5.2.018
 Originator(s): mvdebolskiy
-Date: Wed 31 Jul 2024 04:38:36 PM MDT
+Date: Thu 01 Aug 2024 02:53:41 PM MDT
 One-line Summary: Fix/excess ice cold start
 
 Purpose and description of changes
@@ -76,23 +76,30 @@ Testing summary: regular
 
   regular tests (aux_clm: https://github.com/ESCOMP/CTSM/wiki/System-Testing-Guide#pre-merge-system-testing):
 
-    derecho -----
-    izumi -------
+    derecho ----- OK
+    izumi ------- OK
 
   any other testing (give details below):
 
   SMS_Lm12.f09_f09_mg17.I1850Clm60Sp.derecho_intel.clm-ExcessIceStartup_output_sp_exice
-     derecho ---- PASS
+     derecho ---- PASS (but different from baseline)
 
 Answer changes
 --------------
 
 Changes answers relative to baseline:
 
   Summarize any changes to answers, i.e.,
-    - what code configurations:
-    - what platforms/compilers:
-    - nature of change (roundoff; larger than roundoff/same climate; new climate):
+    - what code configurations: excess ice on
+    - what platforms/compilers: all
+    - nature of change: different at startup
+        Different for cold-start and can be different for a few points where the cold-start
+        values are still used on interpoaltion of an existing finidat file
+
+  Tests that compare different to baseline:
+  ERS_D.f10_f10_mg37.I1850Clm60Sp.izumi_nag.clm-ExcessIceStreams
+  SMS_Lm12.f09_f09_mg17.I1850Clm60Sp.derecho_intel.clm-ExcessIceStartup_output_sp_exice
+         failed baseline comparison (though answers for default physics configurations have not changed).
 
 Other details
 -------------

doc/ChangeSum

@@ -1,6 +1,6 @@
 Tag                   Who      Date  Summary
 ============================================================================================================================
-       ctsm5.2.018 mvdebols 07/31/2024 Fix/excess ice cold start
+       ctsm5.2.018 mvdebols 08/01/2024 Fix/excess ice cold start
        ctsm5.2.017     erik 07/30/2024 Dust emissions control moved to cmeps
        ctsm5.2.016 samrabin 07/27/2024 Enable new crop calendars for clm60 compsets
        ctsm5.2.015 multiple 07/22/2024 Update submodule tags to pass runoff from cism to rof