Document lack of deps for uv-venv-lock-runner (#94)

Author: hynek

README.md

@@ -78,6 +78,9 @@ In this example:
 - `dev` will use the `uv-venv-lock-runner` and use `uv sync` to install dependencies to the environment with the `dev`,
   `test` and `type` extra groups.
 
+Note that when using `uv-venv-lock-runner`, _all_ dependencies will come from the lock file, controlled by `extras`.
+Therefore, options like `deps` are ignored.
+
 ### uv_seed
 
 This flag, set on a tox environment level, controls if the created virtual environment injects pip/setuptools/wheel into