Potential fix for code scanning alert no. 1: Workflow does not contain permissions

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: sebsto

.github/workflows/swift.yml

@@ -2,6 +2,9 @@
 
 name: Swift Simple Check
 
+permissions:
+  contents: read
+
 on:  
   push:
     branches: [ "main" ]