:+1: version and update docs

CHANGES.md

@@ -1,6 +1,10 @@
 # CHANGES
 
-## v4.0.0-RC
+## v4.0.1-RC
+
+*
+
+## v4.0.0
 
 ### BREAKING CHANGES
 
@@ -9,6 +13,8 @@
 * 'default-dark' theme is now merged as a dark mode variant of 'default' theme
 * 'blue-night' theme is now merged as a dark mode variant of 'mono-blue' theme
 
+Upgrading Guide: <https://docs.growi.org/en/admin-guide/upgrading/40x.html>
+
 ### Updates
 
 * Feature: Sidebar

package.json

@@ -1,6 +1,6 @@
 {
   "name": "growi",
-  "version": "4.0.0-RC",
+  "version": "4.0.1-RC",
   "description": "Team collaboration software using markdown",
   "tags": [
     "wiki",