fix: Workflow permissions

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Author: dermatz

.github/workflows/functional-tests.yml

@@ -7,6 +7,9 @@ on:
     branches: [main]
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   functional-tests:
     name: Functional Tests (Magento 2.4.8, PHP 8.4)