Update dependency ruby to v4

Author: renovate[bot]

.github/workflows/release.yml

@@ -106,7 +106,7 @@ jobs:
       - name: Install Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7.8
+          ruby-version: 4.0.6
       - name: Install packagecloud.io CLI
         run: |
           gem install package_cloud