:+1: version and update docs

CHANGES.md

@@ -1,8 +1,9 @@
 CHANGES
 ========
 
-## 2.3.0-RC
+## 2.3.0-RC3
 
+* Feature: LDAP Authentication
 * Fix: node versions couldn't be shown
 * Support: Upgrade libs
     * express-pino-logger

package.json

@@ -1,6 +1,6 @@
 {
   "name": "crowi-plus",
-  "version": "2.3.0-RC2",
+  "version": "2.3.0-RC3",
   "description": "Enhanced Crowi",
   "tags": [
     "wiki",