Update dependency ruby to v4

renovate[bot] · web-flow · commit 78cb2f08bdce · 2025-12-25T05:12:09.000Z
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.2'
+          ruby-version: '4.0.0'
           bundler-cache: true
 
       - name: Spec
diff --git a/.ruby-version b/.ruby-version
@@ -1 +1 @@
-3.1.4
+4.0.0
