small test matrix

.github/workflows/y.yml

@@ -7,20 +7,13 @@ on:
     - cron: "30 14 * * *"
 
 jobs:
-  ruby-versions:
-    uses: ruby/actions/.github/workflows/ruby_versions.yml@master
-    with:
-      engine: cruby
-      min_version: 2.5
-
   yamatanooroti:
-    needs: ruby-versions
     name: >-
       yamaoro ${{ matrix.os }} ${{ matrix.ruby }}
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
+        ruby: [3.3]
         os: [ ubuntu-latest ]
     timeout-minutes: 30
     steps:
@@ -51,6 +44,7 @@ jobs:
         os: [ windows-2022 ]
         ruby: [3.3]
         console: [ classic, legacy ]
+    timeout-minutes: 30
     defaults:
       run:
         shell: cmd