fix: Use `FileUrl` on the `resources/list` call in the `simple-resource` example#907

Kludex merged 1 commit intomodelcontextprotocol:mainmodelcontextprotocol/python-sdk:mainfrom

nandsha:fix/simple-resource-url-validationnandsha/mcp-python-sdk:fix/simple-resource-url-validationCopy head branch name to clipboard