Use the same continue-on-error (#460)

for both test benchmark-default workflows

Author: k0kubun

.github/workflows/test.yml

@@ -37,6 +37,7 @@ jobs:
 
       - name: Run tests
         run: bundle exec rake test
+        continue-on-error: ${{ matrix.ruby == 'truffleruby' }}
 
   benchmark-default:
     runs-on: ubuntu-latest