Update changelog for 2.7.3

cyderize · cyderize · commit 473baf54fb1c · 2023-04-20T15:21:40.000+10:00
diff --git a/MiniZincIDE/CHANGES b/MiniZincIDE/CHANGES
@@ -1,3 +1,7 @@
+2023-04-20
+  v2.7.3
+-  Only show MOOC error code when response is actually an error (#176).
+
 2023-04-05
   v2.7.2
 -  Fix patching of `RPATH` for binaries and libraries in Snap package.
