Run ShellCheck directly in GitHub Actions

Signed-off-by: sarfraj89 <try.sarfraj@gmail.com>

.github/workflows/shellcheck.yml

@@ -1,14 +1,14 @@
-name: ShellCheck
+name: Lint Bash Scripts
 
 on:
-  workflow_dispatch:
   pull_request:
+    paths:
+      - 'scripts/**.sh'
   push:
     branches:
       - main
     paths:
-      - '**.sh'
-      - '.github/workflows/shellcheck.yml'
+      - 'scripts/**.sh'
 
 permissions:
   contents: read
@@ -17,12 +17,10 @@ jobs:
   shellcheck:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout code
+      - name: Checkout
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Run ShellCheck
-        uses: ludeeus/action-shellcheck@master
-
-        with:
-          scandir: scripts
-          severity: error
+        run: shellcheck ./scripts/**/*.sh