docs: bump pypi example to 0.2.4 (#40)

## Summary
- update the PyPI example install instructions to require
`lance-context>=0.2.4`
- align the example's `pyproject.toml` dependency with the new release

## Testing
- Not run (docs/config change only)

Author: beinan

examples/pypi-basic/README.md

@@ -1,6 +1,6 @@
 # Lance Context PyPI Example
 
-This example demonstrates how to install the `lance-context` package from PyPI and work with a context store using the Python API.
+This example demonstrates how to install the `lance-context` package (0.2.4 or newer) from PyPI and work with a context store using the Python API.
 
 ## Setup
 
@@ -13,7 +13,7 @@ This example runs directly from the `src/` directory and only installs `lance-co
 cd examples/pypi-basic
 uv venv
 source .venv/bin/activate
-uv pip install lance-context
+uv pip install "lance-context>=0.2.4"
 ```
 
 ### Using pip
@@ -22,7 +22,7 @@ uv pip install lance-context
 cd examples/pypi-basic
 python -m venv .venv
 source .venv/bin/activate
-pip install lance-context
+pip install "lance-context>=0.2.4"
 ```
 
 ## Run the demo

examples/pypi-basic/pyproject.toml

@@ -8,7 +8,7 @@ version = "0.1.0"
 description = "Example project demonstrating the lance-context PyPI package."
 readme = "README.md"
 requires-python = ">=3.11"
-dependencies = ["lance-context>=0.1.0"]
+dependencies = ["lance-context>=0.2.4"]
 
 [project.scripts]
 context-demo = "context_example.main:main"