Migrate actions to use fixed hash version

Author: hsbt

.github/workflows/test.yml

@@ -25,9 +25,9 @@ jobs:
           - { os: macos-15-intel, ruby: '3.4' }
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
     - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
+      uses: ruby/setup-ruby@90be1154f987f4dc0fe0dd0feedac9e473aa4ba8 # v1.286.0
       with:
         ruby-version: ${{ matrix.ruby }}
     - name: Install dependencies