CHANGELOG.md in google-cloud-datastore-2.8.0 vs CHANGELOG.md in google-cloud-datastore-2.9.0

@@ -1,6 +1,12 @@
 # Release History
 
+### 2.9.0 (2024-03-10)
+
+#### Features
+
+* Update minimum supported Ruby version to 2.7 ([#25298](https://github.com/googleapis/google-cloud-ruby/issues/25298)) 
+
 ### 2.8.0 (2023-09-12)
 
 #### Features
 
 * Support sum & avg aggregate functions ([#22884](https://github.com/googleapis/google-cloud-ruby/issues/22884))