Update peps/pep-0842.rst

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: ZeroIntensity

peps/pep-0842.rst

@@ -255,8 +255,8 @@ and removed due to third-party usage:
 * `tdda/tdda#21 <https://github.com/tdda/tdda/issues/21>`__
 
 
-``scikit-learn``
-^^^^^^^^^^^^^^^^
+scikit-learn
+^^^^^^^^^^^^
 
 The `scikit-learn <https://scikit-learn.org/stable/>`__ package vendored
 ``six`` and ``joblib``, which downstream packages then used and were broken