Simplify bundler cache on CI

Author: tricknotes

.github/workflows/tests.yml

@@ -35,17 +35,7 @@ jobs:
       uses: "ruby/setup-ruby@v1"
       with:
         ruby-version: "${{ matrix.ruby }}"
-
-    - name: "Generate lockfile"
-      run: |
-        bundle config path vendor/bundle
-        bundle lock
-
-    - name: "Cache Ruby dependencies"
-      uses: "actions/cache@v4"
-      with:
-        path: "vendor/bundle"
-        key: bundle-${{ hashFiles('Gemfile.lock') }}
+        bundler-cache: true
 
     - name: "Install Webdriver"
       run: |