link to pyproject.toml for extras

Author: orbeckst

doc/source/installation.rst

@@ -104,7 +104,7 @@ MDAnalysis offers several optional dependency groups (“extra tags”) that you
 - ``parallel``: install dask to enable parallel analysis across multiple cores or machines.
 - ``doc``: install documentation build dependencies (e.g. Sphinx, themes).
 
-To see the full list of available extras, check the `pyproject.toml file`_.
+To see the full list of currently available extras, check the ``[project.optional-dependencies]`` dependencies section in the `pyproject.toml file`_.
 
 To install with optional features, use pip with one or more extras:
 
@@ -285,4 +285,4 @@ This installation does not download all the datasets; instead, the datasets are
 .. _Branches page: https://github.com/MDAnalysis/mdanalysis/branches/all
 .. _CHANGELOG: https://github.com/MDAnalysis/mdanalysis/blob/develop/package/CHANGELOG
 .. _PyPI: https://pypi.org/project/MDAnalysis/
-.. _pyproject.toml file: https://github.com/MDAnalysis/mdanalysis/blob/35d9d2e3ab08e7e6741b57fe02a7215fe3b91a6c/package/pyproject.toml#L69
+.. _pyproject.toml: https://github.com/MDAnalysis/mdanalysis/blob/develop/package/pyproject.toml