Potential fix for code scanning alert no. 28: Workflow does not contain permissions

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

Author: daveshanley

.github/workflows/build.yaml

@@ -11,6 +11,9 @@ on:
     branches:
       - main
 
+permissions:
+  contents: read
+
 jobs:
   buildWindows:
     name: Build Windows