[tool/generator test] Update resources directory path in yaml_assets_test.dart - #60

This run of the CodeQL Action does not have permission to access the CodeQL Action API endpoints. As a result, it will not be opted into any experimental features. This could be because the Action is running on a pull request from a fork. If not, please ensure the workflow has at least the 'security-events: read' permission. Details: Resource not accessible by integration - https://docs.github.com/rest