Fix release date

dmpgpro · dmpgpro · commit 163c92d080a4 · 2017-08-31T22:28:52.000+03:00
diff --git a/doc/src/sgml/release-pro-9.6.sgml b/doc/src/sgml/release-pro-9.6.sgml
@@ -4,7 +4,7 @@
   <title>Postgres Pro 9.6.5.1</title>
   <note>
     <title>Release Date</title>
-    <simpara>2017-08-30</simpara>
+    <simpara>2017-08-31</simpara>
   </note>
   <sect2>
     <title>Overview</title>
