Update test matrix.

Author: fnando

.github/workflows/ruby-tests.yml

@@ -19,14 +19,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["2.7", "3.0", "3.1"]
+        ruby: ["3.3", "3.4"]
         gemfile:
           - Gemfile
 
     steps:
-      - uses: actions/checkout@v2.4.0
+      - uses: actions/checkout@v4
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: vendor/bundle
           key: >