add log aggregation in whats new section (#75028)

* add log aggregation in whats new section

* Update docs/sources/whatsnew/whats-new-next/index.md

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

* Update docs/sources/whatsnew/whats-new-next/index.md

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

* remove empty line

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Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

docs/sources/whatsnew/whats-new-next/index.md

@@ -17,6 +17,17 @@ weight: -37
 
 Welcome to Grafana Cloud! Read on to learn about the newest changes to Grafana Cloud.
 
+## Log aggregation for Datadog data source
+
+<!-- Taewoo Kim -->
+<!-- OSS, Enterprise -->
+
+_Generally available in Grafana Cloud_
+
+The Datadog data source now supports log aggregation. This feature helps aggregate logs/events into buckets and compute metrics and time series. For more information, refer to [Datadog log aggregation](/docs/plugins/grafana-datadog-datasource/latest#logs-analytics--aggregation).
+
+{{< video-embed src="/media/docs/datadog/datadog-log-aggregation.mp4" >}}
+
 ## API throttling for Datadog data source
 
 <!-- Taewoo Kim -->