ci: optimize cargo audit workflow

uses actions-rust-lang/audit, which
has caching

Signed-off-by: Pau Capdevila <pau@githedgehog.com>

Author: pau-hedgehog

.github/workflows/cargo-audit.yaml

@@ -3,20 +3,17 @@ name: Cargo Audit
 on:
   push:
     paths:
+      - '.github/workflows/cargo-audit.yaml'
       - '**/Cargo.toml'
       - '**/Cargo.lock'
-  pull_request:
-    paths:
-      - '**/Cargo.toml'
-      - '**/Cargo.lock'
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch:
 
 jobs:
   audit:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - name: Install cargo-audit
-        run: cargo install cargo-audit
-      - name: Run cargo audit
-        run: cargo audit
+      - uses: actions-rust-lang/audit@v1
+        name: Audit Rust Dependencies