Test against jruby and truffleruby head

Author: vinistock

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["2.7", "3.0", "3.1", "3.2", "jruby", "truffleruby"]
+        ruby: ["2.7", "3.0", "3.1", "3.2", "jruby-head", "truffleruby-head"]
     name: Ruby ${{ matrix.ruby }}
     steps:
       - uses: actions/checkout@v3