Clarify `3` in `build.tools.python`
@@ -359,7 +359,7 @@ You can use several interpretes and versions, from CPython, PyPy, Miniconda, and
:Type: ``string``
:Options:
- ``2.7``
- - ``3``
+ - ``3`` (last stable CPython version)
- ``3.6``
- ``3.7``
- ``3.8``
