Bump ruby/setup-ruby from 1.315.0 to 1.321.0 (#10159)

Author: dependabot[bot]

.github/workflows/tests_sdk_ruby.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7
       - name: Set up Ruby ${{ matrix.ruby-version }}
-        uses: ruby/setup-ruby@0dafeac902942906541bc140009cdbf32665b601
+        uses: ruby/setup-ruby@95ef2b042f9d7a56d8268cba8559e2842e2ad01b
         with:
           ruby-version: ${{ matrix.ruby-version }}
       - name: Set up Python