DOC: Update changelog

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bashtage · Mar 28, 2019 · b19b712 · b19b712
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diff --git a/doc/source/changes/4.0.txt b/doc/source/changes/4.0.txt
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+Release 4.8.1
+=============
+- Fixed a bug which prevented extension modules from being correctly imported.
+
 Release 4.8
 ===========
 - Added Zivot-Andrews unit root test :class:`~arch.unitroot.ZivotAndrews`.