chore(ci): run cargo-audit weekly to check for known vulnerabilities in dependencies. (#3246)

`cargo audit` checks for dependencies with known issues. This PR adds a github workflow that runs `cargo audit` on a weekly basis on `HEAD` and whenever a dependency changes.

Signed-off-by: Michael Rodler <mrodler@amazon.de>
Co-authored-by: Michael Rodler <mrodler@amazon.de>
Co-authored-by: f0rki <m@mrodler.eu>

Author: f0rki

.github/workflows/cargo-audit.yml

@@ -0,0 +1,17 @@
+name: cargo-audit
+on:
+  push:
+    paths: 
+      - '**/Cargo.toml'
+      - '**/Cargo.lock'
+  schedule:
+    - cron: '0 16 * * Mon'
+
+jobs:
+  security_audit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: rustsec/audit-check@v2
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}