Cap linter

.github/workflows/lint.yml

@@ -1,13 +1,18 @@
 name: linter
+
 on:
   pull_request:
+    paths:
+      - '**.sh'
   push:
+    paths:
+      - '**.sh'
 
 jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
       - name: Run ShellCheck
         uses: azohra/shell-linter@latest