CHANGELOG.md in google-apis-dataflow_v1b3-0.3.0 vs CHANGELOG.md in google-apis-dataflow_v1b3-0.4.0

@@ -1,6 +1,10 @@
 # Release history for google-apis-dataflow_v1b3
 
+### v0.4.0 (2021-03-04)
+
+* Regenerated from discovery document revision 20210217
+
 ### v0.3.0 (2021-02-09)
 
 * Regenerated from discovery document revision 20210131
 
 ### v0.2.0 (2021-01-20)