ci.yml in trailblazer-macro-contract-2.1.3.beta1

- old
+ new

@@ -4,10 +4,10 @@
   test:
     strategy:
       fail-fast: false
       matrix:
         # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
-        ruby: [2.5, 2.6, 2.7, '3.0', head, jruby, jruby-head]
+        ruby: [2.6, 2.7, '3.0', jruby]
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1
       with: