CHANGELOG.md in google-apis-chat_v1-0.72.0 vs CHANGELOG.md in google-apis-chat_v1-0.73.0

@@ -1,6 +1,10 @@
 # Release history for google-apis-chat_v1
 
+### v0.73.0 (2023-10-01)
+
+* Regenerated from discovery document revision 20230926
+
 ### v0.72.0 (2023-09-24)
 
 * Regenerated from discovery document revision 20230914
 
 ### v0.71.0 (2023-09-10)