Update changelog for cismwrap_2_2_003

ChangeLog

@@ -2,6 +2,38 @@
 This file describes what tags were created on master and why
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+Originator: jedwards
+Date: July 12, 2024
+Version: cismwrap_2_2_003
+One-line summary: Updates to git-fleximod
+
+Purpose of changes:
+	Changes to fix bugs and improve performance of git-fleximod.
+
+Standalone checkout supported in this tag (Yes/No): Yes
+   (If yes, this implies that we expect to be able to build and run a
+   case from a standalone checkout using git-fleximod, and for this
+   to continue to work long-term. The answer may be "No" if the set of
+   externals pointed to by manage_externals is broken, or if at least
+   one external points to a temporary branch that is may be deleted in
+   the near future.)
+
+   If No: Notes on externals used for testing:
+
+Changes answers relative to previous tag: B4B
+
+Bugs fixed (include github issue number):
+
+	No documented issues addressed here.
+
+Summary of testing:
+
+	Handful of standalone tests on Derecho with gnu and intel compiler. All of the changes
+	are confined to git-fleximod code only, which was tested by hand.
+	No new baselines generated, for the next tag compare against 2_2_002.
+
+================================================================================
+
 Originator: mvertens, katetc
 Date: June 28, 2024
 Version: cismwrap_2_2_002