update pyproject (#43963)

Author: msyyc

eng/tools/azure-sdk-tools/pyproject.toml

@@ -58,6 +58,9 @@ sdkgenerator = ["tox"]
 [tool.setuptools]
 include-package-data = true
 
+[tool.setuptools.package-data]
+"packaging_tools.templates.packaging_files" = ["*"]
+
 [tool.setuptools.packages.find]
 where = ["."]
 exclude = ["tests*", "build*"]