fix: Readme llamaindex

[cosmyo]

Development Package

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

[project]
dependencies = [
  # Exact version:
  "uipath-llamaindex==0.3.0.dev1001040472",

  # Any version from PR
  "uipath-llamaindex>=0.3.0.dev1001040000,<0.3.0.dev1001050000"
]

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

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