Add Ruby 3.3. to matrix

Author: teoljungberg

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.0", "3.1", "3.2"]
+        ruby: ["3.0", "3.1", "3.2", "3.3"]
         rails: ["6.1", "7.0", "7.1"]
         continue-on-error: [false]