DOC: changed release date in RNs

Author: Liudmila Mantrova

doc/src/sgml/release-pro-10.sgml

@@ -5,7 +5,7 @@
   <title>Postgres Pro 10.1.1</title>
   <formalpara>
     <title>Release Date:</title>
-    <para>2017-11-22</para>
+    <para>2017-12-14</para>
   </formalpara>
   <sect2>
     <title>Overview</title>