Updates upload-artifact since version 2 was deprecated in June, and 3 will be deprecated at the end of November (#332)

Author: torresga

.github/workflows/tests.yml

@@ -44,7 +44,7 @@ jobs:
       - name: Run RSpec
         run: |
           bundle exec rspec
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: Screenshots and logs

app/models/user.rb

@@ -3,5 +3,4 @@ class User < ApplicationRecord
 
   has_many :estimates
   has_many :comments
-
 end