ci: 💚 hopefully fix rubocop build

.forgejo/workflows/rubocop.yml

@@ -8,21 +8,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
-    - name: Set up Ruby 2.7
-      uses: https://github.com/ruby/setup-ruby@v1
-      with:
-        ruby-version: 2.7
-    - name: Cache gems
-      uses: actions/cache@v1
-      with:
-        path: vendor/bundle
-        key: ${{ runner.os }}-rubocop-${{ hashFiles('**/Gemfile.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-rubocop-
-    - name: Install gems
-      run: |
-        bundle config path vendor/bundle
-        bundle config set without 'default doc job cable storage ujs test db'
-        bundle install --jobs 4 --retry 3
     - name: Run RuboCop
-      run: bundle exec rubocop --parallel
+      uses: docker://pipelinecomponents/rubocop:latest
+      with:
+        cmd: rubocop -P -E .