docs: moved contribution guidelines link (#2227)

www/docs/sidebars.js

@@ -494,11 +494,6 @@ module.exports = {
           id: "cli/reference",
           label: "CLI Reference",
         },
-        {
-          type: "doc",
-          id: "contribution-guidelines",
-          label: "Contribution Guidelines",
-        },
         {
           type: "ref",
           id: "references/entities/classes/Address",
@@ -521,6 +516,11 @@ module.exports = {
         },
       ]
     },
+    {
+      type: "doc",
+      id: "contribution-guidelines",
+      label: "Contribution Guidelines",
+    },
   ],
   userGuideSidebar: [
     {