Potential fix for code scanning alert no. 6: Workflow does not contain permissions

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

Author: rishav-karanjit

.github/workflows/issue-notification.yml

@@ -1,4 +1,6 @@
 name: Issue Created Notification
+permissions:
+  contents: read
 on:
   issues:
     types: [opened, reopened]