DOC: style changes for pgpro9_6 release notes

Author: Liudmila Mantrova

doc/src/sgml/release-pro-9.6.sgml

@@ -41,15 +41,15 @@
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-        <para>Dynamic prepare of the <command>psql</command> history path on the Windows systems.</para>
+        <para>Implemented dynamic prepare of the <command>psql</command> history path on Windows systems.</para>
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       <listitem>
         <para>
-          In the B-tree indexes added support of TOAST to INCLUDED attributes.</para>
+          Added support for TOAST to INCLUDED attributes for B-tree indexes.</para>
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