Add permissions for workflow

Author: mhajder

.github/workflows/shellcheck.yml

@@ -4,20 +4,23 @@ on:
   - push
   - pull_request
 
+permissions:
+  contents: read
+
 jobs:
   sh-checker:
     name: Code Analysis
     runs-on: ubuntu-latest
-    
+
     steps:
-    - name: Checkout code
-      uses: actions/checkout@v4
-      
-    - name: Run the sh-checker
-      uses: luizm/action-sh-checker@master
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        SHELLCHECK_OPTS: -S warning
-        SHFMT_OPTS: -s -i 4
-      with:
-        sh_checker_comment: true
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Run the sh-checker
+        uses: luizm/action-sh-checker@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SHELLCHECK_OPTS: -S warning
+          SHFMT_OPTS: -s -i 4
+        with:
+          sh_checker_comment: true