Use bultin bundler cache instead cache action

Github docs suggest using the ruby action with bundler cache, if works.

.github/workflows/ruby.yml

@@ -26,37 +26,16 @@ jobs:
     steps:
     - uses: actions/checkout@v3
 
-    - name: Show available Ruby versions
-      run: |
-        ls $RUNNER_TOOL_CACHE/Ruby
-        uname -a
-        cat /etc/os-release
-
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-        #with:
-        #bundler-cache: true
-
-    - name: Cache gems
-      uses: actions/cache@v3
-      with:
-        path: vendor/bundle
-        key: ${{ runner.os }}-gem-${{ hashFiles('**/Gemfile.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-gem-
-
     - name: Install required packages
       run: |
         sudo apt-get update -y
         sudo apt-get install libpq-dev
         sudo apt-get install g++ qt5-default libqt5webkit5-dev gstreamer1.0-plugins-base gstreamer1.0-tools gstreamer1.0-x
 
-    - name: Bundle
-      run: |
-        pwd
-        gem install bundler -v 2.4.20
-        bundle config path vendor/bundle
-        bundle install --jobs 4 --retry 3
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: true
 
     - name: Test
       run: |