Remove truffleruby from CI

Author: teeparham

.github/workflows/test.yml

@@ -6,16 +6,13 @@ jobs:
     continue-on-error: ${{ matrix.flaky }}
     strategy:
       matrix:
-        ruby-version:
-          ["3.0", "3.1", "3.2", "3.3", "jruby-9.4", "truffleruby-23"]
+        ruby-version: ["3.0", "3.1", "3.2", "3.3", "jruby-9.4"]
         flaky: [false]
         include:
           - ruby-version: "ruby-head"
             flaky: true
           - ruby-version: "jruby-head"
             flaky: true
-          - ruby-version: "truffleruby-head"
-            flaky: true
     steps:
       - uses: actions/checkout@v4