FIx typo nucleous-> nucleus in app/ and modules/ (#8947)

app/controllers/copy_projects_controller.rb

@@ -71,10 +71,10 @@ class CopyProjectsController < ApplicationController
     "copy_from_#{from}"
   end
 
-  def project_copy(nucleous, contract = Projects::CreateContract)
+  def project_copy(nucleus, contract = Projects::CreateContract)
     Projects::SetAttributesService
       .new(user: current_user,
-           model: nucleous,
+           model: nucleus,
            contract_class: contract)
       .call(params[:project] ? permitted_params.project : {})
   end

modules/my_page/spec/features/my/time_entries_current_user_spec.rb

@@ -305,10 +305,10 @@ describe 'My page time entries current user widget spec', type: :feature, js: tr
     entries_area.remove
 
     # as the last widget has been removed, the add button is always displayed
-    nucleous_area = Components::Grids::GridArea.of(2, 2)
+    nucleus_area = Components::Grids::GridArea.of(2, 2)
-    nucleous_area.expect_to_exist
+    nucleus_area.expect_to_exist
 
-    within nucleous_area.area do
+    within nucleus_area.area do
       expect(page)
         .to have_selector(".grid--widget-add")
     end