CHANGELOG.md in google-apis-alertcenter_v1beta1-0.12.0 vs CHANGELOG.md in google-apis-alertcenter_v1beta1-0.13.0

@@ -1,6 +1,10 @@
 # Release history for google-apis-alertcenter_v1beta1
 
+### v0.13.0 (2021-09-01)
+
+* Regenerated from discovery document revision 20210803
+
 ### v0.12.0 (2021-07-27)
 
 * Regenerated from discovery document revision 20210720
 
 ### v0.11.0 (2021-07-20)