Filter Superlinter to Ruby files only (#21976)

.github/workflows/linter.yml → .github/workflows/lint-ruby.yml

----
-#################################
-#################################
-## Super Linter GitHub Actions ##
-#################################
-#################################
-name: Lint Code Base
-
-#
-# Documentation:
-# https://docs.github.com/en/actions/learn-github-actions/workflow-syntax-for-github-actions
-#
-
-#############################
-# Start the job on all push #
-#############################
+name: Ruby Linting
 on:
   push:
-    branches-ignore: [main]
-    # Remove the line above to run when pushing to master
-  pull_request:
-    branches: [main]
+    branches-ignore:
+      - 'dependabot/**'
+    paths:
+      - 'Gemfile*'
+      - '.rubocop.yml'
+      - '**/*.rb'
+      - '**/*.rake'
+      - '.github/workflows/lint-ruby.yml'
 
-###############
-# Set the Job #
-###############
-permissions:
-  checks: write
-  contents: read
-  pull-requests: write
-  statuses: write
+  pull_request:
+    paths:
+      - 'Gemfile*'
+      - '.rubocop.yml'
+      - '**/*.rb'
+      - '**/*.rake'
+      - '.github/workflows/lint-ruby.yml'
 
 jobs:
-  build:
-    # Name the Job
-    name: Lint Code Base
-    # Set the agent to run on
+  lint:
     runs-on: ubuntu-latest
-
-    ##################
-    # Load all steps #
-    ##################
     steps:
-      ##########################
-      # Checkout the code base #
-      ##########################
       - name: Checkout Code
         uses: actions/checkout@v3
         with:
-          # Full git history is needed to get a proper list of changed files within `super-linter`
           fetch-depth: 0
 
       - name: Set-up RuboCop Problem Mathcher
         uses: r7kamura/rubocop-problem-matchers-action@v1
 
-      ################################
-      # Run Linter against code base #
-      ################################
-      - name: Lint Code Base
+      - name: Run rubocop
         uses: github/super-linter@v4
         env:
           DEFAULT_BRANCH: main
-          NO_COLOR: 1 # https://github.com/xt0rted/stylelint-problem-matcher/issues/360
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           LINTER_RULES_PATH: .
           RUBY_CONFIG_FILE: .rubocop.yml