chore: add permissions trivy-docker (coder#4957)

* chore: add permissions trivy-docker

* Update .github/workflows/trivy-docker.yaml

Author: jsjoeio

.github/workflows/trivy-docker.yaml

@@ -33,7 +33,7 @@ permissions:
   packages: none
   pull-requests: none
   repository-projects: none
-  security-events: none
+  security-events: write
   statuses: none
 
 # Cancel in-progress runs for pull requests when developers push