CHANGELOG.md in google-cloud-datastore-2.7.1 vs CHANGELOG.md in google-cloud-datastore-2.8.0

@@ -1,6 +1,12 @@
 # Release History
 
+### 2.8.0 (2023-09-12)
+
+#### Features
+
+* Support sum & avg aggregate functions ([#22884](https://github.com/googleapis/google-cloud-ruby/issues/22884)) 
+
 ### 2.7.1 (2023-05-18)
 
 #### Documentation
 
 * Fixed broken links in authentication documentation ([#21619](https://github.com/googleapis/google-cloud-ruby/issues/21619))