update autorest version (Azure#22248)

Author: msyyc

scripts/quickstart_tooling_llc/llc_initial.py

@@ -77,7 +77,7 @@ def build_package(**kwargs) -> None:
 
     # generate code with autorest and swagger readme
     _LOGGER.info("generate SDK code with autorest")
-    check_call(f'autorest --version=3.4.5 --python --use=@autorest/python@5.8.4 --use=@autorest/modelerfour@4.19.2 --python-mode=update {swagger_readme}', shell=True)
+    check_call(f'autorest --version=latest --python --use=@autorest/python@latest --python-mode=update {swagger_readme}', shell=True)
 
     # generate necessary file(setup.py, CHANGELOG.md, etc)
     work_path = Path(output_folder)