Docs: document we have python38

doc/languages-frameworks/python.section.md

@@ -496,8 +496,8 @@ and in this case the `python35` interpreter is automatically used.
 
 ### Interpreters
 
-Versions 2.7, 3.5, 3.6 and 3.7 of the CPython interpreter are available as
-respectively `python27`, `python35`, `python36` and `python37`. The aliases
+Versions 2.7, 3.5, 3.6, 3.7 and 3.8 of the CPython interpreter are available as
+respectively `python27`, `python35`, `python36`, `python37` and `python38`. The aliases
 `python2` and `python3` correspond to respectively `python27` and
 `python37`. The default interpreter, `python`, maps to `python2`. The PyPy
 interpreters compatible with Python 2.7 and 3 are available as `pypy27` and