Add explicit permissions to test workflow for security

Co-authored-by: rbarker-dev <164891078+rbarker-dev@users.noreply.github.com>

Author: Copilot

.github/workflows/test.yml

@@ -7,6 +7,9 @@ on:
     branches: [ main ]
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   test-basic-checkout:
     name: Test Basic Checkout