fix(ci): run smoke tests from repo root

Author: leiding01

.github/workflows/ci.yml

@@ -8,12 +8,13 @@ jobs:
   smoke-tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v4
+      - name: Setup Node
+        uses: actions/setup-node@v4
         with:
-          node-version: "20"
+          node-version: '20'
 
       - name: Run smoke tests (no deps)
-        working-directory: ds-mutex
         run: npm test