Remove unsupported Ruby version from CI test matrix

Author: veganstraightedge

.github/workflows/ci.yml

@@ -11,19 +11,19 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['3.4', '4.0']
+        ruby-version: ["4.0"]
 
     steps:
       - uses: actions/checkout@v4
-      
+
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true
-      
+
       - name: Run tests
         run: bundle exec rspec
-      
+
       - name: Run Linter
         run: bundle exec rubocop