Update dependency ruby to v3.4.7

Author: renovate[bot]

.github/workflows/rubocop.yaml

@@ -15,6 +15,6 @@ jobs:
       - uses: actions/checkout@v5
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.1'
+          ruby-version: '3.4.7'
           bundler-cache: true
       - run: bundle exec rubocop