fix specs

spec/system/sign_in_spec.rb

@@ -23,7 +23,7 @@ RSpec.describe 'Sign In' do
       fill_in 'Password', with: 'wrong_password'
       click_button 'Sign In'
 
-      expect(page).to have_content('Invalid Email or password')
+      expect(page).to have_content('Invalid email or password')
       expect(page).not_to have_content('Document Templates')
     end
   end
@@ -51,7 +51,7 @@ RSpec.describe 'Sign In' do
       fill_in 'Two-Factor Code from Authenticator App', with: '123456'
       click_button 'Sign In'
 
-      expect(page).to have_content('Invalid Email or password')
+      expect(page).to have_content('Invalid email or password')
       expect(page).not_to have_content('Document Templates')
     end
   end