chore(deps): update dependency ruby to v4

Author: renovate[bot]

.github/workflows/release-rubygem.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.4.8'
+          ruby-version: '4.0.1'
           bundler-cache: true
       - uses: cucumber/[email protected]
         with:

.github/workflows/test-codegen.yml

@@ -43,7 +43,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.4.8'
+          ruby-version: '4.0.1'
 
       - name: generate code for all languages
         run: |