Revert "Docs - Upgrade version and release note (#727)"

This reverts commit adbf0357.

website/package-lock.json

 {
   "name": "superbench-website",
-  "version": "0.12.0",
+  "version": "0.11.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

website/package.json

 {
   "name": "superbench-website",
-  "version": "0.12.0",
+  "version": "0.11.0",
   "private": true,
   "scripts": {
     "docusaurus": "docusaurus",