Update CHANGELOG.rst

CHANGELOG.rst

@@ -9,10 +9,15 @@
 Revision history for ``pannb``
 ==============================
 
+-  v0.1.3: fix ``README.rst``: use hard-coded links to guarantee it compiles everywhere (including PyPI)
+
 -  v0.1.2: minor improvements
 
    -  support pandoc 2.17 and drop older pandoc: improvements in ipynb handling made in upstream. See `pandoc 2.17 release notes <https://github.com/jgm/pandoc/releases/tag/2.17>`__.
    -  speed up by rewriting ``walk_and_convert_jupytext_metadata`` using a prepare function ``prepare_jupytext_metadata`` instead.
 
+   v0.1.2 is not publishable to PyPI as the ``README.rst`` has directives.
+
 -  v0.1.1: support pandoc 2.15–16 where its ipynb reader/writer are improved (See https://github.com/jgm/pandoc/releases/tag/2.15) and is required here.
+
 -  v0.1.0: first release and proof of concept.