feat(github): add deny.toml and workflow file to audit workflow paths

Signed-off-by: Sandro-Alessio Gierens <sandro@gierens.de>

.github/workflows/audit.yml

@@ -4,8 +4,10 @@ on:
     - cron: '0 0 * * *'
   push:
     paths:
+      - '.github/workflows/audit.yml'
       - '**/Cargo.toml'
       - '**/Cargo.lock'
+      - 'deny.toml'
 jobs:
   security_audit:
     runs-on: ubuntu-latest