Fixes admin welcome states new group path

Closes #40645

app/views/dashboard/projects/_blank_state_admin_welcome.html.haml

@@ -10,7 +10,7 @@
           Projects are where you store your code, access issues, wiki and other features of GitLab.
 
   - if current_user.can_create_group?
-    = link_to admin_root_path, class: "blank-state-link" do
+    = link_to new_group_path, class: "blank-state-link" do
       .blank-state
         .blank-state-icon
           = custom_icon("add_new_group", size: 50)

changelogs/unreleased/admin-welcome-new-group-link.yml

+---
+title: Fixed admin welcome screen new group path
+merge_request:
+author:
+type: fixed

spec/views/dashboard/projects/_blank_state_admin_welcome.haml.rb

+require 'spec_helper'
+
+describe 'dashboard/projects/_blank_state_admin_welcome.html.haml' do
+  let(:user) { create(:admin) }
+
+  before do
+    allow(view).to receive(:current_user).and_return(user)
+  end
+
+  it 'links to new group path' do
+    render
+
+    expect(rendered).to have_link('Create a group', href: new_group_path)
+  end
+end