Don't use Active Support 8.0 with Ruby 3.1

Author: etiennebarrie

.github/workflows/test.yml

@@ -13,4 +13,7 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Unlock Active Support
+      run: bundle update activesupport
+      if: matrix.ruby == '3.1'
     - run: bundle exec rspec