update docs

CHANGES.md

@@ -1,9 +1,21 @@
 # CHANGES
 
-## v3.8.0-RC
+## v3.8.1-RC
 
 *
 
+## v3.8.0
+
+### BREAKING CHANGES
+
+- Elasticsearch require the privilege `cluster:monitor/health` instead of `cluster:monitor/nodes/info`
+
+Upgrading Guide: <https://docs.growi.org/en/admin-guide/upgrading/38x.html>
+
+### Updates
+
+* Improvement: Change the health check method for Elasticsearch
+
 ## v3.7.6
 
 * Feature: Empty trash pages
@@ -54,6 +66,14 @@
 
 ## v3.7.0
 
+### BREAKING CHANGES
+
+None.
+
+Upgrading Guide: <https://docs.growi.org/en/admin-guide/upgrading/37x.html>
+
+### Updates
+
 * Feature: [Draw.io](https://www.draw.io/) Integration
 * Feature: SAML Attribute-based Login Control
 * Improvement: Reactify admin pages (Security)