fix(ci): workflow should use npx for CDK CLI

Author: heitorlessa

.github/workflows/run-e2e-tests.yml

@@ -27,9 +27,7 @@ jobs:
       contents: read
     strategy:
       matrix:
-        # Maintenance: disabled until we discover concurrency lock issue with multiple versions and tmp
         version: ["3.7", "3.8", "3.9"]
-        # version: ["3.7"]
     steps:
       - name: "Checkout"
         uses: actions/checkout@v3
@@ -48,7 +46,7 @@ jobs:
       - name: Install CDK CLI
         run: |
           npm install
-          cdk --version
+          npx cdk --version
       - name: Install dependencies
         run: make dev
       - name: Configure AWS credentials