Infra: Run cve checks workflow on pull requests and pushes to main

Author: yeikel

.github/workflows/cve_checks.yml

@@ -1,5 +1,8 @@
 name: "Infra: CVE checks"
 on:
+  pull_request_target:
+  push:
+    branches: [ "main" ]
   workflow_dispatch:
   schedule:
     # * is a special character in YAML so you have to quote this string