CHANGELOG.md in google-cloud-bigquery-1.39.0 vs CHANGELOG.md in google-cloud-bigquery-1.40.0

@@ -1,6 +1,12 @@
 # Release History
 
+### 1.40.0 (2022-12-14)
+
+#### Features
+
+* support table snapshot and clone ([#19354](https://github.com/googleapis/google-cloud-ruby/issues/19354)) 
+
 ### 1.39.0 (2022-07-27)
 
 #### Features
 
 * Update minimum Ruby version to 2.6 ([#18871](https://github.com/googleapis/google-cloud-ruby/issues/18871))