Update .github/workflows/arduino-lint.yml

Co-authored-by: Per Tillisch <accounts@perglass.com>

Author: cmaglie

.github/workflows/arduino-lint.yml

@@ -13,6 +13,8 @@ on:
 jobs:
   lint:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     steps:
       - name: Checkout repository