feat(ci): simplify

.github/dependabot.yml

@@ -1,7 +1,9 @@
----
 version: 2
 updates:
-  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "weekly"
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:

.github/workflows/audit.yml

@@ -1,19 +1,13 @@
 ---
 name: Security audit
 
-'on':
-  # push:
-  #   paths:
-  #     # Run if workflow changes
-  #     - '.github/workflows/audit.yml'
-  #     # Run on changed dependencies
-  #     - '**/Cargo.toml'
-  #     - '**/Cargo.lock'
-  #     # Run if the configuration file changes
-  #     - '**/audit.toml'
-  # Rerun periodicly to pick up new advisories
+"on":
+  push:
+    paths:
+      - "**/Cargo.toml"
+      - "**/Cargo.lock"
   schedule:
-    - cron: '43 05 * * *'
+    - cron: "43 05 * * *"
   # Run manually
   workflow_dispatch: