DOC: update install for PyTables version, xref pandas-dev#10672

Author: jreback

doc/source/install.rst

@@ -245,7 +245,7 @@ Optional Dependencies
 * `Cython <http://www.cython.org>`__: Only necessary to build development
   version. Version 0.19.1 or higher.
 * `SciPy <http://www.scipy.org>`__: miscellaneous statistical functions
-* `PyTables <http://www.pytables.org>`__: necessary for HDF5-based storage. Version 3.0.0 or higher required, Version 3.2.0 or higher highly recommended.
+* `PyTables <http://www.pytables.org>`__: necessary for HDF5-based storage. Version 3.0.0 or higher required, Version 3.2.1 or higher highly recommended.
 * `SQLAlchemy <http://www.sqlalchemy.org>`__: for SQL database support. Version 0.8.1 or higher recommended.
 * `matplotlib <http://matplotlib.sourceforge.net/>`__: for plotting
 * `statsmodels <http://statsmodels.sourceforge.net/>`__