Fix GitHub Actions references and add Markdown linting configuration

.github/workflows/code-quality.yml

@@ -12,12 +12,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        uses: actions/checkout@v4
         with:
           clean: 'true'
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@6d7209f44a25a63e3555ad381fdff3bb1f8a69d2 # v2.29.0
+        uses: shivammathur/setup-php@v2
         with:
           php-version: '7.4'
           extensions: mbstring, intl, zip
@@ -41,12 +41,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: SonarCloud Scan
-        uses: SonarSource/sonarqube-scan-action@5095598c2b051c3ee362e93f38a20a48b71b53a9 # v1.2.0
+        uses: SonarSource/sonarqube-scan-action@v1.2.0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
@@ -56,12 +56,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Run Codacy Analysis CLI
-        uses: codacy/codacy-analysis-cli-action@5cc54a75f9ad88fbd6efc6e2a3ee12626e5f0dbb # v4.3.0
+        uses: codacy/codacy-analysis-cli-action@v4.3.0
         with:
           project-token: ${{ secrets.CODACY_PROJECT_TOKEN }}
           verbose: true
@@ -73,7 +73,7 @@ jobs:
         continue-on-error: true
 
       - name: Upload SARIF results file
-        uses: github/codeql-action/upload-sarif@cdcdbb579706841c47f7063dda365e292e5cad7a # v2.2.7
+        uses: github/codeql-action/upload-sarif@v2
         with:
           sarif_file: results.sarif
         continue-on-error: true