add periodic and workflow dispatches

Author: Ariel Ben-Yehuda

.github/workflows/audit.yml

@@ -4,6 +4,9 @@ on:
     paths:
       - '**/Cargo.toml'
       - '**/Cargo.lock'
+  schedule:
+    - cron: "0 0 * * *"
+  workflow_dispatch:
 jobs:
   security_audit:
     runs-on: ubuntu-latest