Potential fix for code scanning alert no. 7: Workflow does not contain permissions (#579)

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

Author: rocktavious

.github/workflows/security.yml

@@ -1,4 +1,6 @@
 name: Security
+permissions:
+  contents: read
 
 on:
   workflow_dispatch: {}