[DOC] Fix pep 373

Author: benediktjohannes

Doc/faq/general.rst

@@ -311,7 +311,7 @@ releases.
 The latest stable releases can always be found on the `Python download page
 <https://www.python.org/downloads/>`_.
 Python 3.x is the recommended version and supported by most widely used libraries.
-Python 2.x :pep:`is not maintained anymore <373>`.
+Python 2.x is not maintained anymore (<:pep:`373>`).
 
 How many people are using Python?
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