chore: bump version to 0.8.29 (#711)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: RunnanJia

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "uipath-langchain"
-version = "0.8.28"
+version = "0.8.29"
 description = "Python SDK that enables developers to build and deploy LangGraph agents to the UiPath Cloud Platform"
 readme = { file = "README.md", content-type = "text/markdown" }
 requires-python = ">=3.11"