chore: Use actions/checkout v4 and the latest Ruby version for releasing

Ensure the actions/checkout version matches the one used by the other GH
actions that test the libraries.

.github/workflows/release.yml

@@ -29,12 +29,12 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.2.2
+          ruby-version: "3.3"
 
       - name: Publish gems
         env: