set ruby in CI to 3.4

Author: chamod-gamage

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ["3.3"]
+        ruby-version: ["3.4"]
 
     steps:
       - uses: actions/checkout@v4
@@ -39,7 +39,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.3"
+          ruby-version: "3.4"
           bundler-cache: true
 
       - name: Run tests with coverage