Changelog: Updated changelog for 10.2.8 (#89725)

Co-authored-by: grafanabot <bot@grafana.com>

CHANGELOG.md

@@ -1123,6 +1123,15 @@ Users who have InfluxDB datasource configured with SQL querying language must up
 Removes `NamespaceID` from responses of all GET routes underneath the path `/api/ruler/grafana/api/v1/rules` - 3 affected endpoints. All affected routes are not in the publicly documented or `stable` marked portion of the ngalert API. This only breaks clients who are directly using the unstable portion of the API. Such clients should use `NamespaceUID` rather than `NamespaceID` to identify namespaces. Issue [#79359](https://github.com/grafana/grafana/issues/79359)
 
 <!-- 10.3.0 END -->
+<!-- 10.2.8 START -->
+
+# 10.2.8 (2024-06-21)
+
+### Bug fixes
+
+- **Elasticsearch:** Fix URL creation and allowlist for `/_mapping` requests. [#87711](https://github.com/grafana/grafana/issues/87711), [@svennergr](https://github.com/svennergr)
+
+<!-- 10.2.8 END -->
 <!-- 10.2.7 START -->
 
 # 10.2.7 (2024-05-13)