Add permissions to the specific scan job to try fixing trivy (#763)

Author: illegalnumbers

.github/workflows/trivy_scheduled_master.yml

@@ -30,6 +30,9 @@ jobs:
     permissions:
       pull-requests: write
       issues: write
+      security-events: write
+      actions: read
+      contents: read
     runs-on: ubuntu-latest
     steps:
       - name: Checkout