Incorrect path in API Canaries steps

# Please follow the general issue steps first:

- [x] Bug
- [ ] Enhancement
- [ ] Feature Request

### Bug reports:

There are typos on https://serverless-observability.workshop.aws/en/040_synthetics/api_logs.html in multiple places where the instructions say to save to serverless-observability-workshop/code/sample-app-tracing/src/handlers/get-all-items.js but the correct path is serverless-observability-workshop/code/sample-app/src/handlers/get-all-items.js.