(WIP) Update ChangeLog

Aug28 - missing aux_cam test results and no CAM tag yet.

doc/ChangeLog

@@ -1,5 +1,51 @@
 ===============================================================
 
+Tag name:
+Originator(s): gdicker1
+Date: July 5, 2023
+One-line Summary: Add MPAS-A 60 and 30km analytic-ic ncdata
+Github PR URL: https://github.com/ESCOMP/CAM/pull/848
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+ - Add 60 and 30km MPAS-A meshes w/ 32L for analytic ICs: https://github.com/ESCOMP/CAM/issues/847
+
+Describe any changes made to build system: N/A
+
+Describe any changes made to the namelist:
+ - See specific details below in file section.
+
+List any changes to the defaults for the boundary datasets: N/A
+
+Describe any substantial timing or memory changes: N/A
+
+Code reviewed by: cacraig, jtruesdal, nusbaume
+
+List all files eliminated:
+
+List all files added and what they do:
+
+List all existing files that have been modified, and describe the changes:
+M       bld/namelist_files/namelist_defaults_cam.xml
+            - Adds two new MPAS-A notopo files to ncdata section for runs with analytic_ic
+            - Adds mpas_dt for mpasa60 and mpasa30 hgrids
+            - Adds mpas_len_disp for mpasa60 and mpasa30 hgrids
+
+If there were any failures reported from running test_driver.sh on any test
+platform, and checkin with these failures has been OK'd by the gatekeeper,
+then copy the lines from the td.*.status files for the failed tests to the
+appropriate machine below.  All failed tests must be justified.
+
+cheyenne/intel/aux_cam:
+
+izumi/nag/aux_cam:
+
+izumi/gnu/aux_cam:
+
+CAM tag used for the baseline comparison tests if different than previous
+tag: cam6_3_111
+
+===============================================================
+
 Tag name: cam6_3_111
 Originator(s): cacraig, hannay, fvitt
 Date: May 17, 2023