Fix incorrect "versionchanged" version number from revision 76238
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index c6a6405..e1d4779 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -901,7 +901,7 @@
       .. deprecated:: 3.1
          :meth:`failUnlessRaises`.
 
-      .. versionchanged:: 3.1
+      .. versionchanged:: 3.2
          Added the :attr:`exc_value` attribute.