Update ruby/setup-ruby action to v1.261.0

Author: renovate[bot]

.github/workflows/push_gem.yml

@@ -24,7 +24,7 @@ jobs:
 
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Set up Ruby
-        uses: ruby/setup-ruby@cacc9f1c0b3f4eb8a16a6bb0ed10897b43b9de49 # v1.176.0
+        uses: ruby/setup-ruby@1c58d16f1a2d74dc895c05f92d1e31ffe691110e # v1.261.0
         with:
           bundler-cache: true
           ruby-version: ruby