Use ruby/actions/.github/workflows/ruby_versions.yml@master

Author: hsbt

.github/workflows/test.yml

@@ -3,6 +3,11 @@ name: CI
 on: [push, pull_request]
 
 jobs:
+  ruby-versions:
+    uses: ruby/actions/.github/workflows/ruby_versions.yml@master
+    with:
+      engine: cruby
+      min_version: 2.6
   test:
     name: >-
       ${{ matrix.os }} ${{ matrix.ruby }}
@@ -12,7 +17,7 @@ jobs:
       matrix:
         # ubuntu-22.04 uses OpenSSL 3.0, ubuntu-20.04 uses OpenSSL 1.1.1
         os: [ ubuntu-22.04, ubuntu-20.04, macos-latest, windows-latest ]
-        ruby: [ head, "3.1", "3.0", "2.7", "2.6" ]
+        ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
         exclude:
           # uses non-standard MSYS2 OpenSSL 3 package
           - { os: windows-latest, ruby: head }