Fix typo in ChangeLog.

Fixes #121.
Thanks @dmick

ChangeLog.rst

@@ -2,7 +2,7 @@
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 :release date: 2015-01-09
 
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@@ -17,7 +17,7 @@ Bugs fixed
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 :release date: 2015-01-07
 
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@@ -33,7 +33,7 @@ Bugs fixed
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 :release date: 2014-03-26
 
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@@ -49,7 +49,7 @@ Bugs fixed
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 :release date: 2014-02-17
 
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@@ -67,7 +67,7 @@ Bugs fixed
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 :release date: 2013-10-21
 
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 * Raises TypeError instead of ValueError when packer receives unsupported type.
@@ -81,7 +81,7 @@ Changes
 0.3.0
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+Incompatible Changes
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 * Default value of ``use_list`` is ``True`` for now. (It was ``False`` for 0.2.x)