fix: fix hitl redirect link

[ctiliescuuipath]

Generate the hitl link based on new env variables UiPath/uipath-python#1149

Development Package

• Add this package as a dependency in your pyproject.toml:

[project]
dependencies = [
  # Exact version:
  "uipath-langchain==0.5.4.dev1004242246",

  # Any version from PR
  "uipath-langchain>=0.5.4.dev1004240000,<0.5.4.dev1004250000"
]

[[tool.uv.index]]
name = "testpypi"
url = "https://test.pypi.org/simple/"
publish-url = "https://test.pypi.org/legacy/"
explicit = true

[tool.uv.sources]
uipath-langchain = { index = "testpypi" }