:+1: version and update docs

CHANGES.md

@@ -1,7 +1,10 @@
 # CHANGES
 
+## v4.2.2-RC
 
-## v4.2.1-RC
+* 
+
+## v4.2.1
 
 * Fix: Consecutive save operations with HackMD fail
 * Fix: Switching theme to kibela fail

package.json

@@ -1,6 +1,6 @@
 {
   "name": "growi",
-  "version": "4.2.1-RC",
+  "version": "4.2.2-RC",
   "description": "Team collaboration software using markdown",
   "tags": [
     "wiki",