feat: add token input for checkout-action (#10)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Boshen

action.yml

@@ -1,10 +1,18 @@
 name: security-action
 description: Run security checks
 
+inputs:
+  token:
+    description: GitHub token used by taiki-e/checkout-action
+    required: false
+    default: ${{ github.token }}
+
 runs:
   using: composite
   steps:
     - uses: taiki-e/checkout-action@7d1e50e93dc4fb3bba58f85018fadf77898aee8b # v1.4.2
+      with:
+        token: ${{ inputs.token }}
 
     - name: Detect Cargo.lock changes
       id: cargo_lock