(temp) *do* use cache but invalidate them

Author: ParadoxV5

.github/workflows/test.yml

@@ -34,6 +34,8 @@ jobs:
       with:
         windows-toolchain: 'none' # remove this line if the project requires MSYS2 DevKit
         ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true
+        cache-version: 25.1
 
     - name: Test with Minitest
       run: bundle exec rake test:isolated